Moles and pregnancy: what to know

Hormonal and pigment changes during pregnancy may alter the colour of existing moles, especially on areas that receive friction or sun exposure. The abdomen may stretch as pregnancy progresses, which can make a mole seem different in size or shape. These changes can be harmless, but pregnancy should not be used to explain away every change. A mole that becomes very uneven, develops several colours, bleeds, crusts, or remains itchy needs clinical attention.

Take a clear photograph beside a familiar object and note where the mole is, what it looked like before pregnancy, and when you noticed a difference. Use sun protection and avoid picking or rubbing the area. Arrange a skin examination if the change is persistent, marked, or difficult to judge in a mirror. Tell the clinician that you are pregnant so examination and any next step can be planned appropriately. Do not apply home removal products.

Contact a dermatologist promptly for a mole that changes quickly, has an irregular outline, shows contrasting shades, repeatedly bleeds, forms a persistent scab, or becomes persistently sore. Seek urgent care for bleeding that will not stop with firm pressure. A pregnancy-related colour shift may be benign, but urgency is guided by the warning features and the examination, not by pregnancy alone.

Ask whether the mole needs dermoscopic examination, whether a photograph is useful for monitoring, and whether any procedure should wait until after delivery. If removal is advised, ask how the tissue will be examined and how wound care fits with your pregnancy.