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The sensation of the skin crawling and itching is an indication of the nerves of the skin getting irritated. This can occur due to excessive dry skin, or due to conditions like diabetes or other neurological conditions.
Please apply a good moisturizer all over the skin. You can also apply a Calamine lotion, available without a prescription at any store. Calamine has a mild soothing action which will helo with the itching.
Please consult a doctor for an examination.
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