Black toenails, often caused by subungual hematomas from sports injuries or stubbing your toe, are surprisingly common.
Fortunately, there's a simple, pain-free method to drain the blood and restore your nail's appearance.
As someone who's advised countless athletes and active individuals on foot care, I've seen this technique work reliably when done correctly.
Important note: Prioritize hygiene to avoid infection. If the injury is severe, painful, or you're unsure, consult a healthcare professional first.

If the hematoma has formed, follow these steps carefully:
1. Select a clean needle or straightened paper clip.
2. Sterilize it by heating with a lighter or match if possible.
3. Gently drill 1 or 2 small holes in the nail to drain the trapped blood.
4. Repeat if more drainage is needed.
Your nail should clear up quickly—no more blood buildup or discoloration.
This process is painless, and you can perform drainage even days after the injury.
Bandage the area in the interim. Minor peeling may occur, but it's normal and temporary.
For runners, athletes, or those on their feet all day—like cooks or nurses—opt for shoes one size larger.
Avoid excess looseness, as it can cause forward sliding and renewed impact.
Secure laces with a double knot after the first two eyelets to minimize foot movement.