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What are threadworms? Threadworms are tiny, very thin white worms up to 13 millimetres long that live in the intestine

Bed bugs are small parasitic insects that feed on human blood by biting the skin. They do not live on

Pubic lice are small parasitic insects called Phthirus pubis which can live in pubic hair, as well as the hair

Urticaria is an itchy rash or skin eruption, characterised by weals (hives), which may occur anywhere on the body, or

Melanoma is a form of skin cancer. Melanoma starts in melanocytes — tiny cells in the outer layer of skin

Discussion of skin cancer is usually divided into melanoma (by far the most dangerous form) and the non-melanoma skin cancers,

Fungal nail infections, known to doctors as onychomycosis, can affect both toenails and fingernails, but toenail infections are more common.

Athlete’s foot is a common skin infection of the feet caused by a fungus. The fungus causes an itchy, red

Jock itch (also known as tinea cruris or ringworm) is a common fungal infection of the groin, upper thighs or

What is a cold sore? A cold sore is a skin infection that is caused by a virus called herpes

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