Experiencing joint pain in fibgers and a bump on knuckle painful to touch?

Many possibilities. Your pain could be as a result of many different things. A thorough history and physical exam and possibly some laboratory and radiology exams are needed to determine the exact cause. Causes of pain may include: trauma (fracture, sprain, arthritis), infection, metabolic conditions (gout), musculoskeletal or biomechanical abnormality and neurologic conditions (neuropathy).
Need evaluation. Joint pain and possible joint swelling needs to be evaluated. Start with your family doctor if you have one. Otherwise, see a rheumatologist.