Dry and itchy foreskin on penile.

Hi I am married 31 years old. Few weeks back I got itching problem surrounding my penile and scortum basically on my thighs and skin got darker and dry white patches appeared after I started itching it rigoursly as I couldn't control..so to avoid itchness I started applying candid-b regularly for atleast more than couple of days that gave me some relief than on alternate days and stop for sometime. Sometime last week I saw a foreskin bump on penile scared again I applied candid-b and it vanished after a day. I keep using candid-b adjoining my genitals thighs and penile at least 3 times a week. The main problem now is I see a very dry and slightly inflammation foreskin on my penile. The penile foreskin seems to be very thin and it's been a day now. I had sex with my wife a day before. I stop using candid-b cream and applied cocunut oil twice and also tried vico turmeric. But it still the the same. Please help as soon as possible. I am diabetic.