A lentigo is a benign skin growth that resembles a freckle. It is usually a tan or brown spot that is flat or only slightly raised. It can vary in size and shape and can occur as a singular lesion or as multiple lesions (lentigines). Lentigines have been classified into several different types depending

Lice are tiny insects that live on human hair and clothing fibers and can be seen with the naked eye. These tiny bugs attach to the hair and feed on human blood, causing intense itching in the affected areas. People can suffer from 3 different types of infestation: head lice (pediculosis capitis), body

Lichen planus is an inflammatory condition that can affect the skin, hair, nails, and mucous membranes (such as the mouth and genital region). On the skin, it presents as small, pink to purple, itchy, flat-topped papules. Though the rash can appear anywhere (including on the genital skin), favored sites

Lichen sclerosus is a chronic skin condition that most commonly affects the genital skin. The affected areas become thin, white, crinkled, irritated, and/or intensely itchy. Blisters and sores can also form. Left untreated, the condition can lead to scarring and can increase an individual’s risk for

Lichen simplex chronicus is a condition where repeated scratching or rubbing of a site creates a localized, itchy, thickened, leathery patch of skin. Lichen simplex chronicus can present as a solitary lesion or as multiple lesions—usually in areas that are easy to reach. The most commonly involved

Lipomas are common fatty tumors that present as soft or rubbery, lumps or bumps underneath the skin that are easily moved. They can occur as a solitary lesion or as multiple lesions (oftentimes occurring in families). Lipomas can occur anywhere on the body where fat tissue is present, but are most common

Lupus is a group of autoimmune diseases where the body’s own immune system attacks healthy tissue leading to inflammation and damage in the affected organs. Lupus can affect the skin, joints, kidneys, brain, heart, lungs, and blood cells. Types of lupus include: Systemic Lupus Erythematosus (SLE)This

Lyme disease is a tick-borne illness caused by the bacteria Borrelia burgdorferi. It is transmitted to humans through the bite of an infected tick (commonly the deer tick). Early symptoms may include fever, chills, fatigue, headache, body aches, and a characteristic skin rash called erythema migrans.