A skin lesion is a defect, growth, or abnormality on the skin's surface that differs in appearance from the surrounding skin. Skin lesions can be primary or secondary skin lesions.

Learn to identify and define wheal skin lesions. Discover the symptoms, causes, and possible treatment options for wheals.

Abnormal skin growths are known as skin lesions, manifesting in dozens of different ways, and are organized into primary (disease) and secondary (external damage). Explore the layers of …

Discover the common triggers of wheal skin lesions in this informative video lesson. Explore the formation process and treatment options for this condition, followed by a quiz.

Skin lesions exist in a wide variety of appearances, described using specific nomenclature. See the descriptions and terms used in bruises, burns, and different types of birthmarks.

Learn the definition, causes, examples, and treatment of the macule. Compare and contrast a macule and the patch found on the skin, and view pictures of them.

A fissure is a crack in the epidermis, often caused by excessively dry skin. Learn to define a fissure, review anal and foot fissures, and explore the signs, symptoms, and treatment of each …

Use this combination quiz and worksheet before or after viewing the lesson on primary skin lesions to supplement your studies. You can even check...

Lichenification is a hard-to-diagnose skin condition that results in thick, leathery patches. In this lesson, explore the definition, causes, and treatment options for this condition.

Human skin parasites can be quite irritating. Learn about burrowing human skin parasites, parasitic skin infections, other epidermal parasitic skin diseases, as well as their possible …