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A rash is a change in the skin which affects its appearance or texture. A rash may be localised to one part of the body, or affect all the skin. Rashes may cause the skin to change colour, itch, become warm, bumpy, dry, cracked or blistered, swell and may be painful. The causes, and therefore treatments for, rashes vary widely. Diagnosis must take into account the appearance of the rash, other symptoms, what the patient may have been exposed to, occupation, occurrence in family members, etc.
Common causes of rashes include:
- allergies, for example to foods, dyes, medicines, insect stings; such rashes are often called hives
- skin contact with an irritant
- infection or reaction to a vaccine
- skin diseases such as eczema or acne
- autoimmune disorders such as psoriasis
- cancerFor other meanings of Cancer: see Cancer (disambiguation . apoptosis; cancer cells, however, avoid apoptosis. Cancer is a group of related diseases characterized by uncontrolled cell division. Currently, it is believed that cancers arise from both genetic or other disease
- pregnancyPregnancy is the process by which a mammalian female carries a live offspring from conception until it develops to the point where the offspring is capable of living outside the womb. It starts with conception, the process of fertilization to form a zygot
- exposure to sun or heat
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- DermatitisDermatitis also known as eczema is a skin irritation characterized by red, flaky skin, sometimes with cracks or tiny blisters. Dermatitis is extremely itchy, but scratching damages the fragile skin and exacerbates the problem so it is important for people
- Seborrhoeic dermatitisSeborrhoeic dermatitis is a skin disorder affecting the scalp, face and trunk causing scaly, flaky, itchy, red skin. It particularly affects the sebum-gland rich areas of skin. It is thought to be caused by a fungal infection caused by the yeast, Pityrosp
- Contact dermatitisContact dermatitis is a skin disease caused by certain substances when in contact with the skin. External link .
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