Ingrown Toenails: An ingrown toenail (onychocryptosis) is a painful condition that occurs when a sharp corner of the toenail digs into the skin at the side or end of the toe. Symptoms and signs include redness, swelling, and yellowish drainage at the site of the ingrown toenail. Wearing proper shoes, soaking the affected toe, frequent cleaning of the nail, and taking pain relievers are recommended treatments. Surgery may be necessary if infection is present.