Blue-black spots on skin: what to know

A deep or healing pimple can look blue, purple, or black after inflammation or minor bleeding under the surface. Folliculitis, razor bumps, and picking can create similar marks, particularly around hairs. A bruise or trapped foreign material is another possibility. Some dark lesions are not related to acne and need direct examination. Note whether the spot is flat or raised, painful or itchy, and whether it follows a bump, shave, injury, or new product.

Do not squeeze, pierce, scrape, or repeatedly apply acids to the spot. Clean gently, use a non-comedogenic moisturiser if the surrounding skin is dry, and take a clear photograph beside a ruler for comparison. Avoid shaving over a tender bump. A dermatologist can distinguish a resolving blemish from another lesion and may discuss treatments such as LED Light Therapy only when the diagnosis and skin condition make it appropriate.

Arrange a prompt skin assessment if the spot is new, enlarging, changing shape or colour, bleeding, crusting, ulcerated, or unlike your other marks. Seek earlier care if several lesions appear suddenly, pain is severe, or there is spreading redness, warmth, or pus. Do not rely on a home photo to diagnose a persistent blue-black lesion.

Could this be a healing pimple, Folliculitis, or a Razor Bump? Does it need examination or monitoring? Which acne or shaving products should I avoid while the area heals?