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A rash is a change of the skin that affects its color, appearance, or texture. A rash may be localized in one part of the body, or affect all the skin. Rashes may cause the skin to change color, itch, become warm, bumpy, chapped, dry, cracked or blistered, swell, and may be painful. The causes, and therefore treatments for rashes, vary widely.
Rash due to measles. Many skin conditions affect the human integumentary system—the organ system covering the entire surface of the body and composed of skin, hair, nails, and related muscle and glands. [1] The major function of this system is as a barrier against the external environment. [2]
Allergic rashes, like a drug rash, occur when you ingest an allergen, including certain foods, such as peanut allergies, or medications. And viral infections, like coronavirus, can also result in ...
Shingles, also known as herpes zoster or zona, [6] is a viral disease characterized by a painful skin rash with blisters in a localized area. [2] [7] Typically the rash occurs in a single, wide mark either on the left or right side of the body or face. [1]
The diagnosis of chickenpox is primarily based on the signs and symptoms, with typical early symptoms followed by a characteristic rash. Aciclovir: Yes: Alphavirus: Chikungunya: Laboratory criteria include a decreased lymphocyte count consistent with viremia.
Hives, also known as urticaria, is a kind of skin rash with red and/or flesh-colored, raised, itchy bumps. [1] Hives may burn or sting. [2] The patches of rash may appear on different body parts, [2] with variable duration from minutes to days, and do not leave any long-lasting skin change. [2]
An exanthem is a widespread rash occurring on the outside of the body and usually occurring in children. [1] It is usually caused by a virus, [2] but an exanthem can be caused by bacteria, [3] toxins, drugs, other microorganisms, or as the result from autoimmune disease.
Tinea is often called "ringworm" because the rash is circular, with a ring-like appearance. It is sometimes equated with dermatophytosis , and, while most conditions identified as "tinea" are members of the imperfect fungi that make up the dermatophytes , conditions such as tinea nigra and tinea versicolor are not caused by dermatophytes.