BLACK SPOT ON TOENAIL
What causes a toenail to go dark?

The color of the toenails is often white. Discolorations can occasionally be brought on by nail polish, malnutrition, infection, or trauma. There are many reasons why toenails get black, some of which go away on their own. You should visit your doctor to rule out the most serious reason for your black toenail if it doesn't improve after a few weeks.

Why do toenails turn black?

A black toenail could result from:

Underlying medical conditions: Anemia, diabetes, heart disease, and kidney disease are a few examples of this.

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