Some women report developing hives (an itchy, red rash) during or after every nursing session. Often this rash will be on the neck, chest or abdomen and will subside within the first one to two hours after nursing.
Hives may occur because the hormone histamine plays an important role in milk filling the breasts.
Recurrent hives with breastfeeding will usually subside before the end of the first month.
You may use a type II, non-sedating antihistamine to manage the symptoms or prevent the onset of the rash. Using a type I antihistamine such as diphenhydramine (Benadryl) can lead to a decrease in milk production.
***If you develop hives while breastfeeding, speak with your doctor to make sure there is no other reason for the onset of your hives (allergy to medication, food, etc.).***