<s>[INST] I slammed my thumb with a large safe door at work yesterday. Went to a doctor and had xrays done. Nothing is broken but I do have blood pooling under the nail. Since my doctor visit yesterday at 9 am and today 3pm the blood has increased from a third of my nail to the whole thing and now the pad of my thumb has a swollen pressure and a slight numb pain. I can live with the pain but my brain is making up worst case possibilities like: I damaged part of my thumb ans the pressure is cutting off circulation to the tip and they will need to amputate. Is this just pressure from the blood behind my nail? If I don t have a hole poked into the nail what is the worst that could happen? I already know I will lose my nail. [/INST] Hello, Thank you for your contact to Chat Doctor. I understand your concern. If I am your doctor I suggest you that you will lose your nail. But pressure from blood in the close compartment can cause gangrene. I advise you should visit nearby doctor and get your self Chat Doctor.  Usually gangrene won't appears in all cases. I will be happy to answer your further concerned can contact me. Chat Doctor. Infectious disease specialist. Thank you. </s>