Monistat), clotrimazole (Canesten, Hydrozole), terbinafine (Lamisil), butenafine and tolnaftate (Tinactin), many available
without a
prescription, are used to clear up the infection. Pyrithione zinc, found in Head & Shoulders shampoo, is a very effective treatment for ringworm on the scalp and can be used as a body wash to assist in overall treatment.
If it does not improve iy could also be eczema or psoriasis of scalp.
ref:http://en.wikipedia.