Skin marks are any type of discoloration, growth, or abnormality that appears on the skin. BLEMISH is a 7-letter term used to describe a small mark or imperfection on the skin, such as a pimple or scar. MOLE is a 4-letter term used to describe a dark spot on the skin, usually caused by an accumulation of melanin. LESION is a 6-letter term used to describe any abnormal tissue change, such as a wound, ulcer, or tumor. All three terms can be used to describe various types of skin marks.