Skin Allergies During Pregnancy

Skin allergies during pregnancy may be due to various causes. They should always be managed correctly with the guidance of a professional.
Skin Allergies During Pregnancy
Maria del Carmen Hernandez

Written and verified by the dermatologist Maria del Carmen Hernandez.

Last update: 23 January, 2023

Skin allergies during pregnancy encompass three general categories of skin conditions. This is due to physiological or hormonal changes, exacerbation of pre-existing skin conditions, or pregnancy-specific manifestations. Whatever their origin, they should never be neglected and symptomatic treatment should be an option.

Skin allergies during pregnancy

Itching and skin changes are common during pregnancy and are usually benign conditions that resolve on their own. In fact, itching is the main clinical manifestation of these conditions. The skin changes vary in location, morphology, and the time of onset, but have many similarities.

Polymorphous eruption of pregnancy

Also known as PUPPP (pruritic urticarial papules and plaques of pregnancy), it’s a benign inflammatory disorder that resolves spontaneously. In most cases, it usually affects first-time mothers during the third trimester of pregnancy or in the early postpartum period.

Clinical manifestations

Symptoms begin in the abdominal region, often where stretch marks appear, along with an intense, pruritic urticarial rash with erythematous and edematous plaques and papules. A distinctive feature is the undamaged preservation of the umbilicus. The pathology even spreads to different parts of the body, such as the back, buttocks, and proximal thighs.

Optional treatment

Treatment is based on mitigating the symptoms. Therefore, topical corticosteroids with or without oral antihistamines are used to control itching and the progression of skin allergies during pregnancy. The reaction is self-limiting and the lesions usually disappear weeks after birth without scarring or pigmentary changes in the injured area.

A pregnant woman with an itchy belly.
In general, allergy treatment in pregnancy is aimed at controlling itching and preventing the condition from progressing.

Intrahepatic cholestasis of pregnancy

Known as pruritus gravidarum, it’s a liver disorder characterized by severe itching and secondary skin lesions in the third trimester of pregnancy. The origin is multifactorial and involves an interaction between genetic predisposition, hormonal changes, and exogenous factors.

Clinical manifestations

This skin allergy in pregnancy is characterized by severe pruritus, without primary skin lesions, with or without jaundice. Consequently, itching starts on the soles and palms of the hand and then becomes generalized. Secondary lesions are usually excoriations or prurigo nodules from scratching.

The treatment of cholestasis

Symptoms tend to resolve on their own within two days of delivery, except on some occasions, it persists for a few weeks.

Atopic eruption of pregnancy

This is a benign and pruritic condition in which papular or eczematous lesions occur in patients with a predisposition or history of atopic dermatitis. Atopic eruption of pregnancy is the most frequent cause of pruritus during this period, with a prevalence of 5 to 20%.

Clinical manifestations

The symptomatology starts early in the first or second trimester and tends to reappear in the following pregnancies due to the atopic base of the person. The main symptoms are pruritic excoriations/lesions, itching, and eczematous skin lesions. In fact, intense scratching causes excoriations that are vulnerable to the development of secondary skin infections.

Therapeutic options

Treatment will depend on the severity of the condition of the pregnant woman. Although the use of topical corticosteroids is usually sufficient, in more severe cases, systemic corticosteroids or antihistamines tend to be used. When scratching causes secondary bacterial infections (with staphylococci or streptococci), antibiotic treatment should be used.

A pregnant woman sitting in bed scratching her belly.
Pemphigoid or herpes gestationis produces blisters, inflammatory skin lesions, and itching. It usually disappears within two months postpartum.

Pemphigoid gestationis

Previously known as herpes gestationis , it’s a rare skin condition during pregnancy that’s characterized by blistering.

Clinical manifestations

It usually manifests in the third trimester of pregnancy with inflammatory skin lesions and intense itching. In addition, it tends to recur in subsequent pregnancies in a more prompt and severe manner. The rash is polymorphic, where pruritus is the main symptom and, in most cases, precedes the cutaneous manifestations.

The treatment of pemphigoid gestationis

Pemphigoid gestationis resolves within two months after delivery. However, therapeutic management depends on the severity of the condition and the stage of the skin lesions. The aim of the measures to be implemented is to relieve itching and prevent the development of new blisters.

Skin allergies and pregnancy

During pregnancy, there are important hormonal, metabolic, immune, and vascular changes that can have an impact on the skin’s surface. Allergies during pregnancy should never be neglected and their cause should always be diagnosed. What’s more, most tend to resolve postpartum and only require symptom management.

Some recommendations for prevention include constant moisturizing, the use of lukewarm water in baths and showers, not wearing tight clothing, and avoiding scratching.

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The contents of You Are Mom is for educational and informational purposes only. At no time do they replace the diagnosis, advice, or treatment from a professional. If in doubt, it's best to consult a trusted specialist.