The most common cause of swollen finger joints playing basketball is injury to the joint capsule of the finger. For the degree of swelling, different treatment options are available. If the swelling is mild, it can be treated sufficiently by applying ice and reducing local activity on your own. If the swelling is very serious and even accompanied by bruising, that is, the local area is already blue and bruised, this situation may be accompanied by bone and joint damage, it is recommended that the patient go to the hospital for X-ray examination and diagnosis and treatment with the help of a doctor.