Nail abnormalities (nail disease) can be a sign of many diseases and health problems. In particular, nail dystrophy with nail deformities is a very common condition, a warning sign for many patients.

Subungual glomus tumor is a rare benign tumor with typical symptoms of cold intolerance, severe paroxysmal pain, and well-defined pain location. However, definitive diagnosis is only made by histology after surgical excision.

Abnormal changes in nail morphology can be considered a basis to support the diagnosis of certain systemic or dermatological diseases. Nail diseases can be classified as localized nail diseases, diseases due to congenital or genetic defects, nail diseases associated with systemic diseases or widespread skin diseases.