I Woke Up One Morning With A How On My

I woke up one morning with a how on my finger. As days went by, it got hard. Now it bleeds asks won't stop bleeding. It bleeds a lot and footer long periods of time. It's a numb pain. Could you yep me what it could be? It's now a white circle with a bloody clot like thing kind of bulging out. If I hit it a tiny bit it will stay oozing blood