Itching in genital area slowly it reached penis head (even there leathery skin).now small white specks like pustules on the head and rim. They dont itch?

STD or fungal infxn. This could be a form of fungal infection (tinea or 'jock itch'), which would respond to OTC antifungal medicine like tolnaftate or terbinifine. Pustules on the penis are of more concern - unless these go away quickly with antifungal treatment, please get yourself checked for a sexually transmitted disease (STD)