Published on: 6/20/2025
Brown discoloration of nail beds can be caused by chronic kidney disease or conditions like melanonychia, which involves pigment changes in the nails.
Brown discoloration of the nail beds can have several causes. One possible reason is chronic kidney disease. People with this condition might notice brown arcs on their nail beds. This happens because of changes in their body due to the disease. Another reason could be melanonychia. This is when the nails change color because of increased pigment. It can happen in one or more nails and might look like a brown or black streak. Sometimes, these changes are harmless, but they can also be a sign of something more serious, like a tumor in the nail area.
If you notice changes in your nails, it's important to talk to a healthcare professional. They can help figure out the cause and if any treatment is needed.
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