Rash in pregnancy

Certain changes in pregnancy are almost physiological.

• common changes include spider naevi, palmer erythema, a generalized hyperpigmentation with local pigmentation of linea alba, areaolae, and genitalia.
• chloasma sometimes occurs

Skin disorders associated with pregnancy include:

• pruritus gravidarum (most common specific disorder)
• polymorphic eruption of pregnancy
• pemphigoid gestationis
• prurigo gravidarum

If considering an infectious cause for the development of the rash in pregnancy. A flowchart summarising contact with vesicular or non-vesicular rash (1):

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Reference:

1. UK Health Security Agency (July 2024). Guidance on the investigation, diagnosis and management of viral illness (plus syphilis), or exposure to viral rash illness, in pregnancy