Onychocryptosis, commonly known as an ingrown toenail, occurs when the edge of a toenail grows into the surrounding skin. This condition can cause pain, swelling, and redness, often leading to infection if not treated properly. It typically affects the big toe but can occur in any toe. Factors contributing to onychocryptosis include improper nail trimming, tight footwear, and genetic predisposition. Treatment options range from home care, such as soaking the foot, to medical interventions like nail removal in severe cases. Maintaining proper nail hygiene and wearing well-fitting shoes can help prevent this condition.