Because anyone can develop skin cancer, it’s very important for everyone to be aware of the signs and symptoms. Being able to recognize them may help prevent development of the disease.
Sometimes a lesion that won’t heal is a sign of skin cancer. This can include open sores (such as an ulcer) that may have oozing, bleeding, or crusting for more than four weeks—or it may be a lesion that heals and then returns. Normal wounds heal within a week or so.
A lesion that persistently bleeds for a month or longer should be checked, especially if it bleeds without being touched (or touched lightly). This could be a sign of basal or squamous cell skin cancer, which both have tissue that is delicate and easily injured.