Ringworm can last up to four weeks with over-the-counter skin treatment, according to Healthline. Unfortunately, ringworm may not clear up on its own and a prescription antifungal medication may be needed, notes MedicineNet.com.
Over-the-counter topical creams containing clotrimazole, miconazole and terbinafine can treat ringworm infections, according to MedicineNet.com. In more severe cases, a physician may prescribe oral antifungal medications such as terbinafine and fluconazole. These medications are given for three-month periods.
During treatment, it is important to keep the infected areas clean and dry, according to Healthline. In addition, patients with ringworm should avoid scratching the skin, as this can cause a bacterial infection. A medical professional should investigate symptoms that become worse or do not resolve with treatment.