Swelling and pain in the thumb may be gout, and it is important to go to the hospital to check if the uric acid is high. If uric acid is high and lumps, redness and pain are evident in the joints of the thumb, you may have to take medication for gout, such as benzbromarone or febuxostat. You need to pay attention to your diet during an acute attack of gout, and you should not eat a high purine diet such as raw food, animal offal and beer. There is also a possibility of inflammation above the finger, or even the formation of an abscess, which is purulent dactylitis, and requires anti-infection treatment and surgery at a surgical clinic to cut out the pus and change the medication regularly.