Itching of the skin in any part of the body can have a very large number of causes, some of which I shall list below:
over cleaning of the skin with soaps and shampoos that remove too much of the natural oil from the skin.
drying of the skin from long exposure to the sun, which may be helped by oily creams (eg. sorbolene).
dermatitis of many different causes may result in a minimal rash but a maximal itch. Mild steroid creams may assist.
psoriasis, a skin disease that is more common in older people, and causes red, scaly, itchy patches, particularly on the scalp, elbows and knees.
scabies, caused by a tiny insect burrowing under the skin. Small red dots or lines may be seen, but the whole area may be very itchy.
liver failure can cause a generalised itch of the skin in many parts of the body.
allergies may occur in any part of the body in response to a wide range of substances in the environment, and result in intensely itchy skin.
a nerve rash may flare at times of stress and anxiety to cause an itch. If I continued the list, I would probably fill several pages, but the above suggestions may be helpful. Obviously the best solution is to take your itchy skin to a doctor so that s/he can examine it carefully, make a diagnosis and prescribe appropriate treatment.
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