Pregnancy is a period of profound physiological and immunological change, and its effect on chronic skin conditions like eczema and psoriasis is notoriously unpredictable. For many women, pregnancy acts as a natural treatment, providing a significant reprieve from symptoms, while for others, it can trigger severe flare-ups. In the UK, managing these conditions during pregnancy involves a careful balance of maintaining the mother’s comfort while ensuring the safety of the developing baby. Because the immune system shifts its focus during pregnancy to protect the foetus, the inflammatory pathways that drive skin disease are often temporarily altered.
What We’ll Discuss in This Article
- The role of hormonal shifts and immune tolerance in skin health.
- Why many women with psoriasis see an improvement in their skin.
- The atopic eruption of pregnancy and why eczema often flares.
- Managing the safety of topical and systemic treatments.
- The impact of pregnancy on the skin barrier and hydration.
- Postpartum considerations and rebound flares.
1. The Psoriasis Clearing Effect
For approximately 60% of women with psoriasis, pregnancy brings a welcome improvement in their skin. This is largely due to the surge in progesterone and oestrogen.
- Immune Shift: Psoriasis is driven by a Th1-type immune response. During pregnancy, the body naturally shifts toward a Th2-type response to prevent the mother’s body from rejecting the foetus. This shift effectively dampens the specific pathways that cause psoriasis plaques.
- Peak Improvement: Most women notice their skin clearing significantly during the second and third trimesters as hormone levels reach their peak.
2. Why Eczema often flares
In contrast to psoriasis, eczema often worsens during pregnancy. In fact, eczema is the most common skin condition encountered during pregnancy, appearing in two main ways:
- The Atopic Eruption of Pregnancy: This term describes eczema that occurs for the first time during pregnancy or a significant flare-up of a pre-existing condition.
- Th2 Dominance: Because pregnancy promotes a Th2 immune response, and eczema is itself a Th2-driven condition, the hormonal environment can actually fuel the inflammation, leading to increased redness and intense itching.
3. Managing Treatment Safety
The most critical aspect of managing skin conditions in pregnancy is the safety of the medications used. In the UK, the NHS and the British Association of Dermatologists provide strict guidelines for expectant mothers.
Safe Treatments
- Emollients: These are the foundation of care and are entirely safe to use liberally throughout pregnancy.
- Mild to Moderate Topical Steroids: These are generally considered safe when used on limited areas of the body.
- Phototherapy (NB-UVB): Narrowband UVB is the gold standard for severe flares during pregnancy as it does not involve systemic medication.
Treatments to Avoid
- Methotrexate and Acitretin: These are strictly avoided due to the high risk of birth defects.
- PUVA: The medication (psoralen) used in PUVA therapy is avoided during pregnancy.
4. The Postpartum Rebound
While pregnancy may provide a temporary honeymoon period for psoriasis, many women experience a flare-up in the months following birth. As hormone levels crash and the immune system returns to its baseline state, a rebound flare is common. For those breastfeeding, it is essential to discuss with a GP which treatments can be safely resumed, as some medications can pass into breast milk.
Conclusion
The impact of pregnancy on eczema and psoriasis is a unique journey for every woman. While the immune shifts of pregnancy often soothe psoriasis, they can frequently aggravate eczema. The key to a healthy pregnancy with a skin condition is proactive communication with both your midwife and your dermatologist. By adjusting your treatment plan to focus on safe, non-systemic options like emollients and UVB light, you can manage your symptoms effectively while prioritizing the health of your baby.
Can I use my usual steroid cream while pregnant?
You should review all medicated creams with your GP. While mild steroids like hydrocortisone are usually fine, very potent steroids should be used sparingly and only under medical supervision.
Does pregnancy-induced eczema affect the baby?
No; eczema is a condition of the mother’s immune system and skin. It does not directly harm the baby, though the mother’s stress and lack of sleep from itching should be managed.
Will my psoriasis definitely flare after I give birth?
Not definitely, but it is common. It is a good idea to have a postpartum skin plan in place with your doctor before you give birth.
Is biological therapy safe during pregnancy?
Some newer biologics (like Certolizumab pegol) do not cross the placenta and are increasingly used in the UK for pregnant women with severe psoriasis, but this requires specialist consultant approval.
Why is my skin so much drier now that I’m pregnant?
Pregnancy requires a lot of hydration for the increased blood volume and the baby. This can sometimes steal moisture from your skin, making emollients even more important than usual.
Authority Snapshot (E-E-A-T Block)
This article examines the clinical relationship between pregnancy and chronic inflammatory skin conditions. It is written by the MyPatientAdvice Medical Writing/Research Team and reviewed by Dr. Rebecca Fernandez, a UK-trained physician with experience in maternal health and dermatology. All guidance follows the safety standards provided by the NHS and NICE for 2026.
