If you have pain, swelling, or inflammation that’s not getting better—or you aren’t sure why you have a black toenail—you should see your doctor. You might have dealt with a fungus that ...

If you have nail fungus, your toenail color might be: white yellow reddish brown green black The discoloration tends to start under the tip of your nail. Left untreated, the discolored area will ...

Rarely, people may mistake melanoma for nail fungus. Although melanoma may be difficult to detect, the nails usually have more extreme pigmentation changes, such as brown or black color bands on ...