Conversation: The conversation between human and AI assistant.
[|Human|] I smashed my fingertip in a car door Tue afternoon. As of Thu afternoon, the fingernail has gone completely blue with some slight white spots and the end of the finger is swollen enough that I cannot bend the most distal joint. I still have capillary refill in the skin around the fingernail and in the pad of the fingertip, and feeling, although it s a pins & needles feeling. At what point do I really need to be concerned? If I lose feeling, I presume I should go to the emergency room right away?
[|AI|]  Thank you very much for contacting Chat Doctor. You have problem of pin and needle like pain at fingertips that may be because of nerve problems. Diabetic neuropathy may cause pain like pin and needle like. Check your blood sugar level. Nerve compression may cause this type of symptoms. Nerve injury may rule out. MRI is helpful for further diagnosis. Proper physical examination and history give exact idea. Consent a physician for further diagnosis. I hope my guidance is helpful to you. . Take care. Thank you very much.