Suggest Treatment For Penis Itching, Premature Ejaculation And Discharge

hello doctor,
i have general itches around my my sex organ. when exposed in fresh air, the surrounding becomes whitish as dandruft, it itches me so much that i tought it was fungi thus tool nizora, dexarel and dermobacter. i had no possitive change. i also experience quick ijaculation during sex and before sex i notice usually some clear substance from my penis thats slipry like mucos. i also experience frequent muscle cramps