Swelling of the right thumb may be caused by certain physiological factors, or it may be caused by pathological factors, such as trauma, gout, allergy, infection, etc., and you should consult a doctor in time to find out the cause of the disease. 1. Physiological factors: If the sleeping or working posture is not correct, the right little finger is compressed for a short time and blood circulation is impaired, which may cause localized swelling. Usually, after moving the fingers, the symptoms will disappear gradually. 2. Pathologic factors: (1) Gout: gout has a very important relationship with high purine dietary factors, such as offal, beer, seafood and so on. The affected right little finger can appear red, swelling, heat, pain and dysfunction and other manifestations. (2) Allergy: If the right pinky is exposed to certain allergens or is bitten by mosquitoes, an over-immune response may occur, with symptoms such as itching and swelling of the fingers. (3) Infection: If the skin of the right pinky is invaded by bacteria, germs, fungi and other pathogens causing an inflammatory reaction in the local tissues, local swelling and other symptoms may occur. In addition, trauma, tenosynovitis attack, synovitis and other causes can also appear the symptoms of swelling of the right little finger. Therefore, when you find swelling of the right little finger, you should consult a doctor in time, make a clear diagnosis and follow the doctor’s instructions.