Dehydration When Breastfeeding: Causes, Symptoms, And Treatment

Dehydration When Breastfeeding

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Dehydration is the medical term for lack of fluid in the body. Anyone, including lactating mothers, with fluid loss and low water intake, can become dehydrated. Severe dehydration in lactating mothers might reduce the amount of breast milk. However, mild dehydration may not affect milk supply. In this post, we tell you about the causes, risks, signs, symptoms, treatment, and prevention of dehydration while breastfeeding.

Can Breastfeeding Cause Dehydration?

The reduced intake of fluids while breast feeding may cause dehydration.Nursing mothers were found to lose an average of 700 ml of water a day by eight weeks postpartum (1). Lactating mothers are thus recommended a required daily intake of 3.1 liters (13 cups) of water, which can help manage water loss from breastfeeding (2).

Make it a habit to drink a glass of water while nursing the baby, in addition to having it after meals and other regular times.

Do note drinking extra fluids than the optimal requirement will not result in additional milk production. Therefore, if your thirst is quenched, then do not force yourself to drink more water. 

Does Dehydration Affect Breastfeeding?

Severe dehydration may reduce milk production. However, this may not be a significant marker of dehydration while breastfeeding as other significant symptoms might surface even before the fall in milk supply. Usually, mothers seek medical care due to other symptoms and signs of dehydration before the reduction in the amount of breast milk.

Although exclusively breastfeeding mothers should consume additional fluids to maintain optimal hydration status, breastfed babies do not require extra water for hydration since 87% of breast milk is composed of water (1). Recommended formula feeds also meet the recommended fluid requirement of infants.

Signs And Symptoms Of Dehydration When Breastfeeding

The signs and symptoms may vary depending on the severity. You may experience a range of symptoms from an increase in thirst to confusion.

The following signs and symptoms can be associated with dehydration (3):

  • Extreme thirst
  • Headache
  • Nausea
  • Dry mouth and lips (chapped lips)
  • Dark urine and oliguria (decreased urine output)
  • Constipation
  • Tiredness or fatigue
  • Dizziness
  • Muscle cramps
  • Confusion
  • Rapid breaths and heart rate
  • Hypo tension (low blood pressure)

Dehydration may worsen after a nursing session, and decrease in milk could increase the risk of dehydration in your baby. Babies can become dehydrated sooner than adults.

You may consume more fluids and continue to breastfeed even when you are having diarrhea, vomiting, chronic illness, etc.

Risks And Causes Of Dehydration During Lactation

Any health condition that causes water loss from the body and reduced intake of fluids could cause dehydration in nursing mothers.The following factors could increase the risk or cause dehydration while breastfeeding (4).

  • Excessive sweating due to climate, physical activity, or fever
  • Continuous vomiting
  • Diarrhea
  • Common cold or flu
  • Diabetes insipid us and other chronic diseases

Lactating mothers require more daily water intake than other women, and this may speed up dehydration. Hot and humid environments, not drinking enough water, and lack of clean water supply could also increase the risk of dehydration in nursing mothers.

Most of the conditions listed above could result in fluid and electrolyte loss from the body. Although mild dehydration can be corrected by drinking water, moderate and severe dehydration requires medical care. 

Does Dehydration Affect The Baby?

Maternal dehydration may also cause dehydration in the baby. Breastfed babies can develop hypernatremic dehydration, which isa high serum sodium concentration in the blood due to reduced fluids, which may result in severe complications if effective treatments are not given on time (5).

When To Visit A Doctor

If you have symptoms of severe dehydration, such as fainting, muscle cramps, headache, etc.,then seek immediate medical care. You may require rehydration with intravenous fluids in a hospital setting. Seek immediate care if you have signs of dehydration along with vaginal bleeding in the postpartum period.

Early medical care can help avoid complications. Talk to your doctor if you have mild dehydration or continuous diarrhea or vomiting. Do not use over-the-counter rehydration solutions without your doctor’s advice.

Treatment For Dehydration In Nursing Mothers

Your doctor may start rehydration therapy after assessing symptoms and physical examination. Blood tests and urine tests are often ordered for confirmation and to identify the level of electrolyte loss.

Rehydration therapy is the treatment for dehydration. It is the replacement of lost electrolytes and fluids from the body (6). The intensity of rehydration therapy is decided depending on the fluid loss. Mild dehydration can be corrected with oral rehydration solutions.

Severe dehydration requires intravenous (IV) fluid correction to hydrate. Most people recover quickly after dehydration treatments. Your doctor may also prescribe medications to treat the underlying cause, such as diarrhea or vomiting. Taking oral rehydration solutions (ORS) or electrolyte powders without doctor’s advice is not recommended to prevent dehydration.

If your breastfed baby is dehydrated, then they will also receive rehydration therapy in the emergency room.

Tips To Prevent Dehydration During Breastfeeding

Sometimes, new mothers forget to drink adequatefluids while putting the needs of little ones above theirs. However, you need to stay hydrated while breastfeeding to ensure yours and your little one’s good health.

The following tips may help reduce the incidence of dehydration in lactating mothers.

  • Make sure you have a full water bottle nearby to drink throughout the day. Always keep clean and safe water handy. Purified water and bottled water can reduce the chance of water-borne diseases.
  • If you often forget to drink water, then set an alarm or use some hydration apps to remind you.
  • Consume high water content foods, such as yogurt, soups, salads, cucumbers, watermelon, etc. These foods may help you stay hydrated without adding a lot of extra calories.
  • You may add lemon juice or a small amount of fruit juice to make water more palatable. 
  • Avoid caffeinated and sugary drinks, such as coffee, soda, or tea. These may cause dehydration due to diuretic effects (7).

You may drink water until you get pale urine. Dark yellow urine and infrequent urination are signs of dehydration.

Maintaining adequate hydration is essential for everyone, including nursing mothers. Always make sure that you and your baby are hydrated. Reducing the frequency of feeding to avoid dehydration is not recommended by experts. Seek help from a certified lactation consultant to know more about regular intake of water and to plan a daily diet to meet nutritional requirements during lactation.


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. SaptawatiBardosono, et al.,Fluid Intake of Pregnant and Breastfeeding Women in Indonesia: A Cross-Sectional Survey with a Seven-Day Fluid Specific Record; The United States National Library of Medicine
2. Infancy; University of Hawaii
3. Dehydration; The United States National Library of Medicine
4. Water-a vital nutrient;Betterhealth; Victoria State Government
5. Suzanne Boeret al.,Evidence Based Weighing Policy During the First Week to Prevent Neonatal Hypernatremic Dehydration While Breastfeeding; The United States National Library of Medicine
6. Rehydration Therapy; Centers for Disease Control and Prevention
7. Maternal Diet;Centers for Disease Control and Prevention

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Rebecca Koyf

Rebecca Koyf is an International Board Certified Lactation Consultant (IBCLC), Registered Lactation Consultant (RLC),Certified Lactation Counselor (CLC) and a LaLeche League volunteer. She has a Bachelor's degree in Accounting and worked as an Auditor for the NYC Comptroller’s Office for 8 years. Her own breastfeeding struggles made her change her career and pursue the field in lactation. She has her... more

Dr Bisny T. Joseph

Dr. Bisny T. Joseph is a Georgian Board-certified physician. She has completed her professional graduate degree as a medical doctor from Tbilisi State Medical University, Georgia. She has 3+ years of experience in various sectors of medical affairs as a physician, medical reviewer, medical writer, health coach, and Q&A expert. Her interest in digital medical education and patient education made... more