It is difficult to just say wat can be done by description given, i have emphasized again and again to many patients that diagnosis and management of most of skin condition requires examination by inspection which is possible when you see a patient personaly or the photograph.
I feel majority of doctors over here would not be able to advise you except for many vague remedies unless they see it themself.
I request you to either use the paid section of this website to consult a good dermatologist
or visit a dermatologist.
Many Doctors may still differ from what i said
Criticism are most welcome