Eczema

Eczema and Pregnancy: Managing Flares Safely at Every Trimester

June 26, 2026·11 min read

How Pregnancy Changes Eczema

Pregnancy is one of the most immunologically complex states in human biology, and its effects on eczema are unpredictable. About 24–25% of pregnant women with eczema experience significant improvement, but the majority—roughly 50–60%—experience worsening, particularly in the first trimester. A minority (around 25%) see no change. The determining factors include which immune pathways dominate in your pregnancy, hormonal sensitivity, and whether your personal eczema has a primarily Th2 (atopic) or Th1 (barrier dysfunction) basis.

First Trimester: Often the Hardest

The immune system shifts toward Th2 dominance in early pregnancy to prevent rejection of the fetus. Since atopic eczema is already Th2-driven, this shift often amplifies eczema symptoms. Elevated progesterone in early pregnancy can also reduce the skin's natural moisturising factor and worsen barrier function. Many women report their worst eczema of the entire pregnancy in the first 12 weeks.

Second and Third Trimesters

For some women, a Th1 counter-regulatory shift in the second trimester provides partial immune balance and eczema improvement. For others, the increasing physical stress, sweating, and weight-related skin friction in the third trimester worsens the picture. Eczema of pregnancy (EoP), a gestational eczema distinct from pre-existing atopic dermatitis, can also emerge for the first time during pregnancy—usually in the second or third trimester.

Safe Dietary Approaches During Pregnancy

Continue any dietary trigger avoidance that was already helping before pregnancy—there is no reason to reintroduce known triggers
Prioritise omega-3-rich foods: fatty fish (low-mercury options like salmon, sardines, trout) 2–3 times per week
Choose anti-inflammatory foods: colourful vegetables, olive oil, berries, and whole grains
Maintain adequate vitamin D—deficiency is extremely common in pregnancy and linked to worse atopic disease
Probiotic supplements during pregnancy have some evidence for reducing atopic disease in the infant—discuss with your obstetrician

Foods and Substances to Avoid

High-mercury fish (swordfish, tilefish, king mackerel, bigeye tuna) — choose low-mercury fatty fish instead
Alcohol — worsens both gut permeability and skin barrier integrity, and carries fetal risk
Highly processed foods — drive systemic inflammation relevant to both maternal eczema and infant atopic risk
Any foods confirmed as personal eczema triggers before pregnancy

Topical Treatment During Pregnancy

Low- to mid-potency topical corticosteroids are generally considered safe for short-term use during pregnancy and are typically preferable to poorly controlled severe eczema. Tacrolimus and pimecrolimus should be discussed with a dermatologist. Always seek guidance from your dermatologist and obstetrician before using any new topical treatment during pregnancy.

How to Track

Sensio's food and symptom logging is particularly valuable during pregnancy because your eczema baseline changes rapidly. Tracking helps you distinguish dietary flares from hormonal shifts and gives you concrete data to bring to dermatology appointments. Log meals, skin severity, stress, and sleep quality daily for the most useful picture.

FAQ

Will my baby have eczema if I do?

Atopic conditions have a strong genetic component. If one parent has atopic disease, the child has approximately 30–40% risk; if both parents are affected, the risk rises to 60–80%. Prenatal probiotic supplementation and breastfeeding may reduce (but not eliminate) this risk.

Is it safe to use antihistamines during pregnancy?

Some antihistamines (like cetirizine and loratadine) have relatively good safety profiles in pregnancy; others are less well-studied. Always discuss with your obstetrician before use.