20 Different Causes Of Rashes In Babies And Their Prevention

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Babies have sensitive skin, making them more susceptible to infections and allergies. These may also cause rashes in babies, a common condition during infancy. Sometimes rashes could be due to an underlying illness and require prompt medical care. Timely diagnosis and treatment of rashes are important since it could be a simple heat rash or an allergic reaction. Read on to know more about rashes, causes, symptoms, treatment, and ways to deal with them in babies.

Did you know?
During the first four weeks of life, babies are susceptible to a variety of dermatologic skin diseases, most of which are temporary and not severe (25).

What Are The Different Causes Of Rashes In Babies?

Rashes can be categorized based on what causes them. The following is a list of the most common illnesses that cause skin rashes among infants (1) (2) (3):

1. Heat rash

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Heat rash is medicinally called miliaria, and results due to the accumulation of sweat within the pores of the sweat gland, due to excess perspiration. Tiny red bumps cluster together to form heat rashes, which is also called prickly heat.

Symptoms: Fine red and pink rashes around skin folds like underarms, between the joints, and under the thighs. Rashes also appear around the neck, face, and the groin area.

Treatment: A baby prickly heat powder can provide relief to the baby. Keep the affected area exposed to air and do not apply creams or ointments on it. Since heat rashes mostly happen during hot and humid weather, it is okay to leave the baby bare to provide relief from the rash.

2. Skin hives

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Allergies stimulate the release of a compound called histamine, which causes blood plasma to leak into the skin and form skin hives (4). Skin hives are medically called urticaria (5). Papular urticaria, which is similar to regular skin hives, is mostly a result of insect bites (6).

A mild skin rash may occur when the baby is teething, although it is not always the case. Teething may cause a rash around the mouth due to the excessive drooling caused by teething.

Symptoms: Tiny, reddish to pink bumps that appear in clusters or scattered around the body. The rash may ooze liquid when scratched.

Treatment: Treating the rash involves treating the underlying cause of skin hives, which is an allergy. Avoiding the allergen, use of corticosteroid cream and antihistamine medicines can help subdue the allergy, which in turn cures the skin hives. See a doctor before administering medicines to an infant.

3. Eczema

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There is no single cause for the condition, and it is often induced by external factors such as overheating, sweating, and friction of the skin. There are several types of eczema. Eczema due to general reasons is called atopic dermatitis. Eczema caused by friction and contact with a substance is called contact and irritant dermatitis respectively (7).

Symptoms: Dry, scaly skin with very fine rashes that often appear as clusters. Eczema rash can appear anywhere but most common affects the limbs, face, folds of the skin, areas that may have friction with clothing such as the diaper area and waist.

Quick fact
Atopic eczema in babies typically affects the extensor surfaces of the limbs and the face, sparing the baby’s napkin area (26).

Treatment: There is no single cure for eczema. Topical treatment may ameliorate symptoms but are unlikely to address the underlying cause. These include, corticosteroid creams, skin moisturization with eczema-specific moisturizing lotions, calamine lotion, and use of natural, soft fibers for clothing. Also, discourage scratching, which exacerbates eczema.

Wet wraps is also recommended for managing the symptoms of eczema in babies and children, typically overnight.

4. Fungal infections

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The most common fungal infections to affect infants are tinea (ringworm) and candidiasis (yeast infection). Ringworm is caused by any fungus belonging to a group of fungi called dermatophytes. Candidiasis is caused by a fungus belonging to the Candida genus, which is commonly called yeast responsible for diaper rash. Restrictive clothing, trapped moisture, and skin-to-skin contact with an infected individual or even a pet cause the spread of the infection.

Yeast infections could indicate a disruption in microbiome health internally as well as externally and indication for probiotic therapy.

Symptoms: Tinea infection appears as a round circular lesion, made of fine red rashes, presented at multiple parts of the body. The lesion can be of any diameter and resembles a coiled worm, which gives it the name. Candidiasis appears as reddish, scaly rashes mostly around skin folds such as the groin and underarms. The rashes may have whitish bumps in between or a white, semi-liquid substance attached to it.

Treatment: Usually, topical antifungal creams are enough to cure fungal infections. In very severe cases of infection, the baby may need oral antifungal medication. Treatment often lasts for several weeks to even months. Keeping the affected area dry, washing the baby’s clothes and towels in warm water will prevent the fungus from spreading.

5. Skin parasites

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Examples of some skin parasites that can cause rashes are sandworm and microscopic parasites from snails. Infants are most likely to acquire these by playing in contaminated soil or seawater at the beach.

Symptoms: Rashes appear as raised bumps scattered across one region. Some parasites tend to migrate within the skin, thus leaving rashes and a raised trail behind them.

Treatment: The treatment is systemic with the use of anti-helminth (antiparasitic) topical creams and oral medicines. Discouraging itching and application of calamine lotion are ways to tackle the irritation caused by the skin rashes.

6. Chickenpox

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The varicella-zoster virus causes chickenpox. The virus transmits through inhalation of saliva and mucus droplets expelled by an infected person. It may also spread through contact with a chickenpox blister when it is in the contagious stage.

Symptoms: Chickenpox rash has a characteristic puffiness and is fluid-filled. The rash also has an inconsistent shape and can randomly appear on any part of the body. The rash gradually dries to form a scab in a week and fall away.

Treatment: The disease does not have any medication and clears on its own in a week or two. Most infants do not require medical attention for chickenpox. Adequate home care will do (8). Monitor temperature and attend a doctor or accident and emergency if an infant sustains a high fever and/or is unresponsive.

7. Measles

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The measles virus spreads through the inhalation of mucus and saliva expelled by an infected person.

Symptoms: Measles rash is bright pink to red and is mostly flat, arranged in clusters. If a group of small rashes breaks at a part of the body, then they are quite likely to merge to eventually spread to other parts of the body (9).

Treatment: You need to wait for the immune system to fight and remove the virus on its own. The illness usually resolves in a couple of weeks with proper rest and home care. If you think your baby has measles, see a doctor immediately.

Quick tip
Timely vaccination is the most effective way of preventing measles in infants. The measles vaccine should be given twice starting at age 12 months, with a minimum of four weeks separating each dose (27).

8. Hand, foot, & mouth disease

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This disease is caused by the virus Enterovirus coxsackie, which spreads more often during summer. A baby can get the virus in multiple ways, including skin-to-skin contact with an infected person, inhaling the virus, and consuming contaminated food and water.

Symptoms: Rashes are flat, irregularly-shaped, and pink to reddish. You will notice the rash on the skin around the mouth, on the face, hands, soles of the feet, and the buttocks.

Treatment: The body can get rid of the virus on its own. Itching and irritation can be discouraged with the use of calamine lotion. The baby will start feeling better within a week and the rashes should be gone by the end of two weeks.

9. Molluscum contagiosum

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It is caused by the poxvirus (not the same as the Chickenpox virus). A baby contracts the disease through skin-to-skin contact with an infected person.

Symptoms: The tell-tale sign of the condition is the presence of pearl-like, fluid-filled vesicles or blisters on different areas of the body. The density of the rashes varies as per the severity of the infection. The outbreaks tend to be itchy, swollen, and reddish.

Treatment: Oral medication aims at ridding the body of the lesions. These medications and the efforts of the immune system together help overpower the virus and cure the illness. In most cases, the immune system alone will clear the infection within a year. Molluscum contagiosum may take a long time to cure and could persist for a couple of years. Opportunistic infections can be an indicator that a child is depleted. Consider seeing a naturopathic physician to assess nutritional status required to support a healthy immune response.

10. Impetigo

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Impetigo is a bacterial infection that causes fluid-filled blisters that burst to form yellowish-red rashes, which eventually dry and fall off. This condition often develops during hot and humid weather. An impetigo rash is most likely to appear around cuts or breaks on the skin, such as an insect bite or an injury.

Symptoms: Impetigo starts with red sores around the mouth and torso. These sores gradually turn into fluid-filled blisters, which burst and dry to form yellowish rash. The rash subsequently dries to form a scab.

Treatment: Topical antibiotic cream and oral antibiotic medicines are necessary to cure the condition. The irritation from the rashes will subside within a few days of commencing the treatment and the disease will be gone in a few weeks.

11. Neonatal and infantile acne

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Neonatal acne appears during the first three months of a baby’s life while infantile acne occurs after the age of three months. The causes of this acne are unknown. Overactive sebaceous glands (oil glands), due to maternal hormones transmission through breast milk is suspected to be the leading cause. Sometimes, a bacterial infection of the skin may cause excessive oil production and formation of acne.

Symptoms: The acne looks like a cluster of fine, reddish-pink rashes that mostly appear around the cheeks and the forehead. Infantile acne can be similar to adolescent acne with the presence of pus.

Treatment: Treatment is seldom needed because the acne subsides on its own as the baby grows older. In rare instances, the acne could be irritable and lasts for several years. A doctor can prescribe topical ointments in such cases.

12. Folliculitis

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Folliculitis occurs when bacteria from unclean water enter the hair follicles and cause inflammation. A baby can get it when bathed in an unclean bathtub or wearing soiled, wet clothes for too long.

Symptoms: Yellow, pus-filled rashes on any part of the body that could have come in contact with the pathogen.

Treatment: Topical antibiotic and antiseptic ointments are usually sufficient to treat the condition. The condition does not last very long and the rashes will dry and fall eventually.

13. Juvenile plantar dermatosis

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It occurs when the feet get sweaty and dry repeatedly, several times during the day. It can happen when you put the baby’s shoes on and off multiple times in a day.

Symptoms: The affected skin becomes pinkish to red with a scaly appearance. The scales develop a white color and begin to peel as the feet get drier.

Treatment: Treatment through the application of moisturizer is usually all that is needed. Preventive care by keeping the feet dry also helps in subsiding the condition (10). If symptoms are very severe, then a doctor can prescribe ointments to subdue inflammation of the skin.

14. Cradle cap

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Also called seborrheic dermatitis, CC is a common occurrence in infants up until three months of age, of unknown cause. Red to yellowish scales form on the top of the baby’s head. The scales are easily visible on top of the head. Excessive production of oil by the sebaceous gland quite likely causes cradle cap (11).

Did you know?
Cradle cap prevalence in infants peaks at three months of age, for as high as 70%, and then gradually declines as the baby approaches one year of age (28).

Symptoms: Reddish yellow scales form on the top of the head. Rubbing the scales can cause them to flake and fall away from the head. The scales become dry and deep yellow before falling away on their accord.

Treatment: Washing the baby’s hair with a regular baby shampoo every day can help loosen the scales and cure the condition. If there are signs of infection, then the pediatrician can prescribe a medicated shampoo to prevent the likelihood of an infection.

15. Erythema toxicum

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The cause of the condition is unknown, but it is quite likely due to an excessive response of the immune system to the air and substances in the environment. Erythema toxicum is painless and seldom causes any complications to the baby. The rashes mostly appear within a day after birth and disappear in a week (12).

Symptoms: Yellow-white pustule rashes on the chest, face, torso, and the limbs. The number of rashes peak on the second day of appearance.

Treatment: Treatment is not needed as the condition is benign and resolves in about seven days with no lasting effect on the baby’s health.

16. Milia

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Milia occur due to the retention of the protein named keratin and sebum (oil) from the sebaceous gland within the skin. It is most common among newborns, especially those in their first month.

Symptoms: White bumps that range in size from being fine to large in diameter. The rashes mostly appear on the face, particularly on the nose.

Treatment: No treatment is required and the rashes disappear within a month of their appearance.

17. Dengue

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It is caused by the dengue virus that spreads through mosquito bites. The virus does not spread directly from person to person, but is passed by mosquitoes that had earlier bitten someone infected with the dengue virus. The disease is most common in the warm and wet regions in the world (13).

Symptoms: One of the symptoms of the condition is the development of rashes on the body. The rash is reddish-pink and flat.

Treatment: There is no specific medication for the disease. The body clears the virus on its own and supportive care through adequate hydration is vital for the speedy recovery of the baby. Doctors may recommend the use of analgesics, acetaminophen and other drugs containing aspirin for relief from symptoms (14).

18. Fifth disease

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The medical term for the fifth disease is erythema infectiosum. The parvovirus B19 causes the condition. The pathogen spreads through the air when an infected person releases them while sneezing and coughing. A newborn baby may also get the virus in case the mother had the infection before delivery (15).

Symptoms: The disease causes a fine rash on the cheeks, making it look like a slapped cheek. The rashes are very fine and appear-disappear for several weeks.

Treatment: One needs to wait for the immune system to clear the virus on its own. The baby can have acetaminophen (paracetamol) in case they have a fever.

19. Scabies

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Scientifically called Sarcoptes scabiei, it is a parasitic infection caused by the scabies mite. Babies can get the mite from skin-to-skin contact with an infected person or when they come into contact with bedding contaminated with the scabies mite.

Symptoms: The female scabies mite burrows into the skin to deposit its eggs, causing deep red rash marks at the point of entry. Since the mite crawls under the skin, it leaves very fine trails that often connect two rashes. The rashes are itchy and may get inflamed too. The body will also mount an allergic reaction towards the mite thus causing pinkish-red sores all over.

Treatment: Treatment is a combination of creams and ointments containing compounds that kill the mites. The prognosis varies by the intensity of the condition. In typical cases of scabies, the disease is cured within four weeks (16).

20. Scarlet fever

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It is caused by the A Streptococcus bacteria, which transmits through direct contact or inhalation of infected mucus/saliva of an infected person (17).

Symptoms: The pathogen causes a bright red, flat rash all across the body. The outbreak is severe at the folds of the skin like the underarm, crease of the elbow, and the groin.

Treatment: Oral antibiotics along with topical antibiotics are used to cure the condition.

21. Warts

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Warts is the thickening of the skin due to the human Papillomavirus (HPV) that enters through cracks and breaks in the skin (18). Warts are benign and do not usually cause any discomfort. A baby can pick the virus through direct contact with a person who has warts, using unclean bedding, and bathing in contaminated swimming pools or bathtubs.

Symptoms: Warts appear as reddish-gray or brownish bumps on any part of the body. They are seldom flat and mostly extend out way beyond the skin surface.

Treatment: Warts in adults are often treated with the use of liquid nitrogen. However, it can be painful for a baby thus the doctor may use topical ointments containing compounds that can gradually disintegrate the wart. The doctor may then manually extract warts for their complete removal (18).

More often than not, these skin rashes can be prevented by reducing the risk of the conditions that cause them.

How To Prevent Skin Rashes In Babies?

Prevention methods help mitigate the reasons that lead to rashes in babies. Here is what you can do to prevent skin rashes in infants:

  1. Immunize: Conditions like chickenpox and measles can be prevented through immunization. Most vaccines will be a part of the baby’s regular vaccination schedule. You can ask the baby’s doctor about the relevant vaccines.
  2. Maintain good hygiene: The viruses that cause rashes in babies can be kept at bay by maintaining good hygiene. Wash the baby’s hands after outdoor play and wash your hands before handling the infant. If someone in the family is ill, do not let them hold the baby until they are cured. Wash the baby’s clothes separately and do not allow a sibling to use them.
  3. Be watchful of allergies: Babies who eat solid food are susceptible to several allergies. Be cautious, especially when feeding a new food item to the baby. Some conditions such as eczema and cradle cap may begin as a minor rash. But they become severe quickly, so it is best to contain them sooner. If you suspect a rash to be a result of allergy or eczema, then consult a doctor right away. Quick intervention reduces the chances of complications.
  1. Take extra care during hot and humid weather: Hot and humid weather can further several conditions that cause rashes. During the summer months, keep the baby cool and let them stay without diapers for some time every day. It helps keep the skin dry and inhibits the accumulation of sweat.

Frequently Asked Questions

1. What rashes are common in babies?

Diaper rash is the most common skin problem in babies since urine, feces, and dampness can irritate babies’ skin. You may notice various types of diaper rash in babies who wear diapers (19).

2. What does a food allergy look like in a baby?

Skin rashes may appear after the intake of foods that cause allergies. They may present as hives on some areas of the body. Sometimes, individual tiny bumps can cluster and make a more prominent rash. However, some babies may only develop red and inflamed skin without raised lesions (20).

3. How can I tell if a rash is serious?

Skin rashes associated with a stiff neck, confusion, high fever, and light sensitivity are considered severe and require prompt medical care. Breathing problems and appearing ill are signs of serious underlying causes (21).

4. What are babies most allergic to?

Babies are most allergic to cow’s milk, eggs, and peanuts. Soy, wheat, and tree nut allergies are also common in babies. Peanut, shellfish, and fish allergies may trigger severe allergic reactions in babies (22).

5. What does a viral rash look like on a baby?

Viral rashes are tiny pink spots. They may appear on both sides of the stomach, back, and abdominal area. Viral rashes can be associated with fever, cold symptoms, and diarrhea, often lasting for two to three days (23).

6. How can I treat my baby’s rash naturally?

Homecare measures as per the doctor’s recommendations can help manage some self-resolving skin rashes. For example, you may use a cold compress to reduce itchy skin. Moisturizing the skin with ointments and creams can also be beneficial. In addition, colloidal oatmeal baths may help reduce the severity of symptoms (24).

Rashes in babies are common and treatable. Although they are generally not concerning and do not threaten the baby’s health, they may cause discomforts such as pain, itchiness, and irritation. Therefore awareness about their cause can help prevent them from occurring and stay prepared with management tips. Do not panic if you notice symptoms of any of the above rashes, and consult your child’s doctor for prompt and effective treatment.

Infographic: Rare Infant Diseases Causing A Typical Rash

Rashes on the skin and body are common and may not always indicate a severe problem in infants. Nevertheless, some rare diseases may manifest as characteristic rashes in babies, some of which are stated in the infographic below.

rare medical causes of rashes in babies [infographic]
Illustration: MomJunction Design Team


MomJunction's articles are written after analyzing the research works of expert authors and institutions. Our references consist of resources established by authorities in their respective fields. You can learn more about the authenticity of the information we present in our editorial policy.
  1. 12 Common Summertime Skin Rashes in Children; AAP (2017)
  2. Neonatal and Infantile Common Skin Lesions; The University of Chicago Pediatrics Clerkship
  3. Newborn Rashes and Skin Conditions; Michigan Medicine (2017)
  4. Hives; Children’s Hospital Of Philadelphia (2003)
  5. Urticaria; The University of Chicago Pediatrics Clerkship
  6. Urticaria Papular; National Organization for Rare Disorders (Last updated in 2006)
  7. Contact Dermatitis; The University of Chicago Pediatrics Clerkship
  8. Chickenpox; NHS Inform (2018)
  9. Measles Signs and symptoms; CDC (2020)
  10. Juvenile Plantar Dermatosis; AOCD
  11. Cradle Cap; AAP (2009)
  12. E. Roques; M. D. Mendez; Erythema Toxicum; StatPearls Publishing (2017)
  13. Dengue; Medline Plus
  14. Symptoms and What To Do If You Think You Have Dengue; CDC (2012)
  15. Fifth Disease (Parvovirus B19); AAP (2006)
  16. Scabies; American Academy of Dermatology (AAD)
  17. Scarlet Fever: All You Need to Know; CDC (2021).
  18. Warts; University Of Michigan
  19. Rash – child under 2 years.
  20. Does My Baby Have a Food Allergy Rash?.
  21. Rashes in babies and children.
  22. Food Allergies in Children.
  23. Rash or Redness – Widespread.
  24. Home Remedies: What Can Relieve Itchy Eczema?.
  25. Zekayi KUTLUBAY et al.; Newborn Skin: Common Skin Problems; Maedica (2017)
  26. National Collaborating Centre for Women’s and Children’s Health (UK); Atopic Eczema in Children: Management of Atopic Eczema in Children from Birth up to the Age of 12 Years; RCOG Press (2007)
  27. Measles in babies and children; Pregnancy Birth and Baby’s information
  28. Timothy Nobles et al.; Cradle Cap; StatPearls Publishing (2022)
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