Swelling and pain of pinky finger injury may be caused by soft tissue injury, tendon rupture and fracture, etc. It can be treated by general treatment, physical therapy, medication and surgery according to the cause. 1. Soft tissue injury: after the little finger is injured, if there are skin, muscle, ligament and other tissue damage, swelling and pain will occur. After the injury, you can elevate the affected limb, while braking and applying cold compresses to the affected area immediately. Non-steroidal anti-inflammatory and analgesic drugs, such as diclofenac sodium, can also be applied. Generally, it can be recovered in about 2 to 3 weeks. 2. Tendon rupture: after trauma to the little finger, tendon injury of the little finger can occur, and in severe cases, tendon rupture of the little finger can occur, and swelling and pain of the little finger can occur. In severe cases, the tendon may rupture, resulting in swelling and pain in the little finger. Treatment requires braking, and if the tendon is completely ruptured, surgical closure and repair is required. 3. Fracture: If the condition of the little finger is serious, fracture may occur, which will also cause swelling and pain in the finger. In this case, a radiograph is needed and according to the results of the examination, the appropriate treatment will be chosen. If the fracture is not obviously displaced, it can be fixed by manipulation, splint or plaster. If the fracture is severely displaced, it can be treated with surgical incision and fixation. After the injury of little finger, if the swelling and pain is serious, or accompanied by obvious deformity, etc., should go to the hospital for further consultation. The above drugs need to be applied under the guidance of a physician.