Ingrown nails, the most common nail impairment, are nails whose corners or sides dig painfully into the soft tissue of nail grooves, often leading to irritation, redness, and swelling. Usually, toenails grow straight out. Sometimes, however, one or both corners or sides curve and grow into the flesh. The big toe is the most common location for this condition, but other toes can also become affected.
Ingrown toenails may be caused by the following:
- Improperly trimmed nails
- Shoe pressure; crowding of toes
- Repeated trauma to the feet from normal activities