People use garlic as a natural treatment for ringworm topically. Simply make a paste of crushed or minced garlic and apply it to the affected area. You may add olive oil to the crushed garlic to get the desired consistency. Cover the area in an adhesive bandage, leave the paste in place for 1 to 2 hours. Then rinse with warm water to remove. For best results, treat the ringworm-affected area for up to two or three times a day for two weeks. Discontinue use if you experience redness, swelling, or discomfort.