What should you know about bad moles?

A concerning mole may become asymmetrical, develop an irregular edge, show several colours, enlarge, or evolve in shape or texture. A spot that stands out from the person's usual pattern can also merit assessment. These features do not establish a diagnosis on their own; an examination is needed to distinguish harmless moles from skin cancer and other conditions.

Bleeding after a clear injury is different from repeated bleeding without an obvious cause. Persistent crusting, a sore that does not settle, or a new pigmented mark under a nail also warrants attention.

Look at the mole in good light and compare it with older photographs if available. Record the date and take a clear image beside a ruler without repeatedly touching or picking the area. Check less visible sites such as the scalp, back, soles and between the toes, using help or a mirror where needed.

Do not cut, burn or treat a suspicious mole at home. A dermatologist may inspect it with a magnifying device and decide whether monitoring or removal for laboratory examination is appropriate.

Arrange a prompt appointment for a mole that is evolving, repeatedly bleeds, forms a persistent sore, or looks markedly different from nearby moles. Seek earlier review if change is rapid or the lesion is painful and inflamed. Heavy bleeding that does not stop with firm pressure needs urgent care.

Ask which visible features guide the assessment, whether photographs are suitable for follow-up, and whether the whole lesion should be removed. If removal is advised, ask how the sample will be examined, how to care for the wound, and when results will be discussed.