Onychodystrophy refers to any abnormality or deformation in the nails, either of the fingers or toes. This term encompasses a variety of nail irregularities and deformities, such as discoloration, brittleness, ridges, splits, and thinning. Onychodystrophy can be caused by several factors, including trauma, fungal infections, underlying systemic diseases, and certain medications. Proper diagnosis of the specific type of onychodystrophy is essential for targeted treatment and management.