Dark spots that appear on your mouth or lips have severalcauses. By far, the most common cause is known as a melanotic macule or non-cancerous hyperpigmentation of a mucous membrane. This occurs when one of your mucous membranes produces more pigment (melanin) than typical. Your lesion may ...
He had heavily sun-damaged skin and a past history of lentigo maligna on the nose that was treated three years ago with cryotherapy and imiquimod. He had noted some new pigmentation arising in that area. On clinical examination, an irregular pigmented macule of two colours was seen (Figure ...
The melanotic macule should be small, flat, and darker than the surrounding tissue. If it appears suddenly, changes size, or starts to roughen, it may be malignant. A doctor can examine the spot and rule out possible causes to determine if a biopsy is necessary. If the patient is taking...