A rash that appears after eating can be related to various conditions, such as an allergic reaction, contact dermatitis or eczema 2. Each rash is the result of specific foods causing chemical reactions in the baby’s body. If the child is still on an all-liquid diet, she may have a cow’s milk allergy. If she’s eating solid food, other common food allergens may be playing a role in causing a rash. If a rash appears on your baby’s face after eating, make an appointment with your pediatrician for proper diagnosis and treatment options.
If you are experiencing serious medical symptoms, seek emergency treatment immediately.
Food allergies are most commonly found in babies and young children 1. The most common food allergy among babies is a cow’s milk or soy allergy from the formula they are being fed, according to the Baby Center 1. A food allergy occurs when the baby’s immune system mistakes the proteins from the dairy or soy-based product as a harmful substance. The body attacks the proteins with antibodies and histamine. Histamine leads to inflammation and irritation in the skin, causing a rash. Hives is the most common allergic rash that would develop after a baby has just consumed her bottle.
- Food allergies are most commonly found in babies and young children 1.
- Hives is the most common allergic rash that would develop after a baby has just consumed her bottle.
Skin Rashes and Allergies to Soy
If the baby is eating solid foods, contact dermatitis is a common skin rash that only reacts in the localized areas where the food has touched the skin 2. Medline Plus states that the condition will cause:
- tenderness of the skin
- skin lesions on the skin
The rash may blister, ooze and crust over if itched. If your baby develops contact dermatitis after eating a particular food, wipe the baby’s face with a wet paper towel to remove any residue and call the pediatrician 2. After the baby’s face is wiped, the rash should subside within an hour. Common foods that can cause contact dermatitis in a baby after eating are tomatoes and peanut butter 2.
Eczema, or atopic dermatitis, is a chronic skin rash condition that is mostly found in babies and young children. Babies with a family history of asthma and allergies are more likely to develop eczema, according to Kids Health 3. The chronic rash is triggered by various elements, such as the weather, environmental factors and foods. Some foods, such as soy, milk and nuts can trigger an eczema flare-up. If the rash is eczema, it will most likely appear on other parts of the body along with the face.
- Eczema, or atopic dermatitis, is a chronic skin rash condition that is mostly found in babies and young children.
Skin Rashes and Allergies to Soy
Blotchy Skin Rash on a Baby's Face
Skin Rash from Strawberries
A Red Rash on a Baby's Stomach After Eating
Bland Diet for Breastfeeding
Dairy Allergy & Nausea
Chest Pain After Eating Ice Cream
Can Food Allergies Make Your Hand Itch & Turn Red?
Diet for Toddlers With the Stomach Flu
Is a Red Rash on the Cheeks a Sign of a Food Allergy?
- Baby Center: Food Allergies
- Medline Plus: Contact Dermatitis
- Kids Health: Eczema
- Martin PE, Eckert JK, Koplin JJ, et al. Which infants with eczema are at risk of food allergy? Results from a population-based cohort. Clin Exp Allergy. 2015;45(1):255-64. doi:10.1111/cea.12406
- Waserman S. Doctor, can we prevent food allergy and eczema in our baby?. Curr Opin Allergy Clin Immunol. 2016;16(3):265-71. doi:10.1097/ACI.0000000000000267
- Wopereis H, Sim K, Shaw A, Warner JO, Knol J, Kroll JS. Intestinal microbiota in infants at high risk for allergy: Effects of prebiotics and role in eczema development. J Allergy Clin Immunol. 2018;141(4):1334-1342.e5. doi:10.1016/j.jaci.2017.05.054
Diane Marks started her writing career in 2010 and has been in health care administration for more than 30 years. She holds a registered nurse license from Citizens General Hospital School of Nursing, a Bachelor of Arts in health care education from California University of Pennsylvania and a Master of Science in health administration from the University of Pittsburgh.