Redness, swelling and itching of the fingers can be caused by the following: 1. Infection of the skin and soft tissue of the fingers, which can have symptoms of redness, swelling and itching of the skin. Gout can also have local redness, swelling and itching of the skin, and can have the formation of gout stones, then the blood uric acid should be checked and the X-ray and CT of the hand should be taken for diagnosis and early treatment; 3, joint infection and bone infection, then there can be redness, swelling, pain and itching of the joints, and in severe cases there can be the formation of sinus tracts, then the blood tests and the X-ray and MRI of the hand should be checked for diagnosis; 4, tuberculosis. When tuberculosis is present, localized redness, swelling, and itching may also be present, and this is diagnosed by examining the tuberculosis bacteria and taking X-rays and MRIs of the hand.