Causes
Use of tight shoes or high heels that cause the toes to be compressed, leads to abnormal growth of the nail which results in onychocryptosis. If the nail grows sideways and pokes the outer edge of the skin, a crack occurs, giving rise to it. Unhygienic foot, wrong posture, foot injury, long toes, short nails, obesity, injury, diabetes, abnormal foot growth, and sweating of foot are few reasons for the same.