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This is known as hyperhydrosis, it is a common condition due to excessive secretion from the sweat gland
aluminium chloride hexahydrate is a good medicine available for this , you could contact your doctor and get a prescription.You may need to apply this during bed time for 8 to 10 days successfully.Anticholinergic
medicines are also helpful , if your not benefited with medicines ,last resort is to go for surgery called sympathectomy.
This is only a symptomatic condition and nothing to worry much if you can deal with it.
Wish you good health