What causes pain in the knuckles?
Patient: Hi. All of a sudden today I have had pain on two of my knuckles so bad I can t bend two fingers. It is throbbing from knuckles to almost tip of my fingers. It looks a little swollen but I didn t do anything to injure it Doctor: Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice.  The pain in the knuckles can be related to tendonitis. Taking a pain killer can help.   Hope I have answered your query. Let me know if I can assist you further.