Ringworm on your leg is the same as ringworm on any other part of your body except the scalp, and as such, you can get rid of it the same way you would treat any non-scalp ringworm infection. Contrary to its name, this circular skin rash is not caused by a worm at all, but is a fungal infection. Therefore, ringworm on your leg requires treatment with an anti-fungal medication. Over-the-counter anti-fungal creams, lotions, or gels can get rid of most cases of this type of ringworm (REF: CDC Ringworm Information for Healthcare Professionals, CDC Treatment for Ringworm 1)

Treating Ringworm Using Over-the-counter Topical Medications

You can buy an appropriate cream, lotion, or gel at your corner drugstore. Look for a medication containing an antifungal like terbinafine, clotrimazole, miconazole, or ketoconazole. Carefully follow the included instructions, which will typically have you coat the entire circle and borders with the medication, 2-3 times each day for a few weeks. Symptoms generally clear up after two weeks, but continue applying the medication for another two weeks after the symptoms clear. (REF: PubMed Health and CDC Treatment for Ringworm, NYU Langone Medical Center 34)

When to See Your Doctor

While most cases of ringworm on your leg easily clear up after using topical medications, sometimes a rash that looks like ringworm is really a different condition requiring different treatment (REF: American Family Physician). If your infection does not improve after two weeks of treatment, or if it gets worse, you will need to see your doctor. (REF: Ask Dr. Sears 5)