What Causes Discoloration of the Nail Bed, and How Can It Be Treated?

When the nail bed changes color, it can happen for a few reasons. One cause is medication use. For example, minocycline, an antibiotic, may cause the nail bed and skin to become discolored. Another reason is a fungal infection, where the nail may turn dull yellow or brown. In some cases, a condition called melanonychia leads to extra pigment building up in the nail, which might show as a band or overall darkening. Sometimes, simple injuries or repeated minor trauma can also make the nail look darker. Treating nail bed discoloration depends on what is causing it. If it is due to medication, your doctor might decide to change your treatment. For a fungal infection, topical or oral antifungal medicines may be used to clear up the problem. For pigment changes that are benign, the doctor might only monitor them, especially if they do not cause any discomfort. It’s important to have a healthcare provider look at any new or changing nail discoloration to decide on the best treatment plan.