[How I explore...pruritus in a pregnant woman]

Area of Science:

• Dermatology
• Obstetrics
• Maternal-Fetal Medicine

Context:

• Pruritus (itching) during pregnancy can stem from various causes, some unrelated to pregnancy itself.
• However, a significant subset of pruritus arises from pregnancy-specific dermatoses, requiring careful diagnosis.
• These conditions range from benign to those with potential fetal implications.

Purpose:

• To differentiate between non-pregnancy-related pruritus and pregnancy-specific dermatoses.
• To outline the spectrum of pregnancy-specific dermatoses, including pruritus gravidarum, pemphigoid gestationis, and others.
• To identify which of these dermatoses are associated with fetal morbidity.

Summary:

• Pregnancy-specific dermatoses encompass conditions such as pruritus gravidarum (with or without intrahepatic cholestasis), pemphigoid gestationis, polymorphic eruption of pregnancy, prurigo gestationis, acute folliculitis of pregnancy, impetigo herpetiformis, and progesterone auto-immune dermatitis.
• While pruritus can be a general symptom, these specific conditions are directly linked to the gestational state.
• Fetal risks are specifically recognized for pruritus gravidarum with intrahepatic cholestasis, pemphigoid gestationis, and impetigo herpetiformis.

Impact:

• Highlights the importance of recognizing pregnancy-specific dermatoses for appropriate management.
• Informs clinicians about the potential fetal risks associated with certain pruritic dermatoses of pregnancy.
• Aids in differential diagnosis, leading to timely and targeted interventions for maternal and fetal well-being.