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scrotal itching is usually seen in night or when one is completely free from work.If chronic it can lead to thickening of scrotal skin also.Peeling of skin can because of excessive scratching.
You need to apply topical steroid
here for long.
If itching is present over groins (sides of leg) then you need a anti fungal preparation.
Kindly get it examined by a dermatologist
for complete treatment.