You need to visit a doctor who will examine your ear and give you the right medication. This is because your ear skin condition may be as a result of different causes for instance, allergic reaction, eczema or dermatitis.
Does it smell bad also? This could be a yeast infection (not the same as a woman's problem). try putting powder on it overnight and rub deoderant back there during the day. I do agree that a doctor visit would be a good idea though.