<s>[INST] I jammed my thumb playing volleyball 4 days ago. Initial pain, but not after. Swelling went down alot after 2 days. I can now move my thumb back, but can t bend the knuckle all the way forward, probably because of swelling. There is a little bruising near the knuckle, and just a bit near the base. Should I see a doctor? [/INST] Thank you for using HCM. There's been a blunt trauma to your thumb and based on the severity of injury there could be ligamental tear and probably fracture which may require splinting and immobilization of thumb. Please visit the ER get a X ray done and follow up with orthopedician. </s>