What causes melanonychia?
What causes melanonychia? Melanonychia can be caused by inflammatory skin diseases that affect your nails. It can also be caused by inflammation due to friction from shoes and biting your nails. Poor nutrition. Malnutrition can cause melanonychia, especially a lack of protein, vitamin D, or vitamin B12. Should I be worried about melanonychia? Melanonychia is a very worrisome entity for most patients. It is characterized by brownish black discoloration of nail plate and is a common cause of nail plate pigmentation. The aetiology of melanonychia ranges from more common benign causes to less common invasive and in situ melanomas. Can...