Hello Virginia, From the description you have given, its probable that you could be suffering from an arthritis that has been complicated by cellulitis. The most cause will be infectious and could be a Staphylococcus germ whose predisposing factor could be a small crack on the skin consciously or unconsciously sustained. It could also be a crystal induce arthritis that has become complicated with oedema. In the above two conditions, tylenol (acetaminophen) might not adequately relieve pain and does not form the basis of treatment. For pain relieve you could add other drugs like Ibuprofen or diclofenac but they are associated with ulcers. Treatment of infectious arthritis requires potent antibiotics while that of crystal arthritis depends on the type;gouty or peudogouty. You should consider consulting your doctor for an evaluation and for appropriate diagnosis and test such as x-ray, complete blood count, examination of fluids aspirated from the joints if possible. Best regards and hope this helps you. Dr. Achuo