An ingrown toenail occurs when one or both edges of the nail curl under and grow into the adjacent skin. This often causes the skin to become inflamed and painful. It may also bleed or become infected.
Ingrown toenails are usually caused by incorrect cutting of the nails or by wearing tight shoes.
Bathing the foot regularly in a warm salt solution then covering the nail with a dressing may help to relieve pain. If the adjacent skin is infected, antibiotics may be needed. In severe cases, part of the nail may be removed by surgery.