Hand swelling caused by rheumatism, rheumatoid arthritis, gout, need to consult the rheumatology and immunology; due to trauma or fracture need to consult orthopedics; due to mosquito bites, frostbite, need to consult the dermatology: thrombosis and other causes need to consult the vascular surgery. 1. Rheumatology and Immunology: rheumatoid arthritis is caused by immune and infectious factors, which can cause redness, swelling, pain and dysfunction of finger joints; gout is caused by increased uric acid, which can lead to redness, swelling, pain and even the formation of gouty stones in the joints. The above two diseases need to consult the rheumatology and immunology department for appropriate treatment. 2. Orthopedics: when the human body is subjected to violence, trauma and other factors resulting in local soft tissue contusion, fracture and other conditions, may appear in the finger joints of the swelling and accompanied by dysfunction of movement, need to consult the orthopedic department for appropriate treatment. 3. Dermatology: when the human body is bitten by mosquitoes, it can cause swelling of the fingers; due to the cold weather or in a low-temperature environment, it can cause frostbite, both of which need to consult the dermatology department for appropriate treatment. 4. Vascular Surgery: If the swelling is caused by poor circulation such as venous thrombosis and arteritis, you need to go to a vascular surgeon for an angiogram to find the cause of the embolism. In addition to the above diseases, there are many other causes of finger swelling, which need to be treated by a doctor according to the different causes of the patient’s condition, and should not be treated randomly by yourself.