Ringworm usually responds well to self-care within 4 weeks without having to see a doctor.

• Keep your skin clean and dry.
• Apply over-the-counter antifungal or drying powders, lotions, or creams. Those that contain miconazole, clotrimazole, or similar ingredients are often effective.
• Wash sheets and nightclothes every day while infected.

A severe or persistent infection may require treatment by a doctor. Antifungal pills may be given and are necessary if your hair is infected. Prescription antifungal skin medications, such as ketoconazole, are stronger than over-the-counter products and may be needed. Antibiotics may also be needed to treat related bacterial infections.

Infected pets also should be treated.

• Spread of ringworm to other areas
• Bacterial skin infections
• Contact dermatitis or other skin disorders
• Side effects from medications

Call your doctor right away if you have any signs of a bacterial infection, which can result from scratching. These signs include swelling, warmth to the touch, sudden worsening in redness of the patches, red streaking, pus, discharge, and fever.

Call your doctor if:

• Ringworm infects your scalp or beard.
• Your skin does not improve after 4 weeks of self-care.