I have a weird red dot on my finger that bleeds, what possible illness could i have?

Juice

New member
I got a small red dot on the knuckle of my right index finger and i thought it was a scar. I was in Spanish, twisting my hair tie pretty tightly around the finger and it started bleeding. It was a lot of blood and the blood was cold. After washing my finger off i found out that it had bled from the small red dot. I thought that now it would fade away but a few month after it bled, the red dot came back. What is it, is it life threatening, and how do i get rid of it?
 
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