I think you are suffering from a severe fungal infection and which is spreading . U need proper examination suggests Dr.Suruchi Puri a lady dermatologist with 17 years experience and is treating such conditions for last 17 years . U can seek an early appt and get yourself checked for diabetes also . Dr.Suruchi Puri was dermatologist for Femina Miss India also and also helped female contestants with such issues related to their skin and hair . Fungal infection are really difficult to treat since most of them are resistant to the drugs or ointments which were used traditionally or given by doctors since the fungal infection may involve any part of the skin or hair it is important to get a proper diagnosis by an experienced dermatologist who can assess the involvement and then suggest you systemic or local Antifungal therapy .Nowadays newer Antifungals are mostly preferred by most of the good dermatologist , you can visit our website www.drsuruchipurimakeovers.com for seeking an Appointment or u may call 9868 080340 or u can visit B-2/31 janak Puri , nearest metro station is janak Puri east . Don't scratch that area as pus may form in that area .