Hi...dear 
Thanks for choosing HCM..,
White patches on foreskin of the penis....
It is called ...VITILLIGO of 
Prosthesis..(Leucoderma)..,
It is due to Persistent irritation of infection...,
i.e....STDs, FUNGAL, PSYCHOLOGICAL (itching), CHEMICAL...etc.,
Beat Advise is...,
1) Remove foreskin by doing CIRCUMCISSION....
2) Application of 
Clobetasol, Miconazole and gentamycin cream...,
3) Tab Dicaris..( 
Levamisole 150 mg ).,
4) Tab 
Fluconazole 150 mg weekly once for 4 weeks..,
5) Frequent washes with SALT WATER..,
Itching is combat by usiong Cetrizine tabs..,
     ok...good lcuk..,