Hi small white scaly patch over the penis can be candidiasis
rather than herpes
.because in herpes we get erythematous papules all over the penile skin which will subside by one week.
Candidiasis on genital areas can be due to diabetes
or white discharge in the partner.it can be treated by flucanazole 150 mg weekly once for three weeks along with application of onabet ointment twice daily can cure the condition