Hidden pain when the thumb is broken may be related to joint capsule injury or tendon injury of the finger, and the treatment mainly adopts plaster, splint immobilization or topical medication. 1. Plaster and splint fixation: when the thumb is broken, the joint capsule of the finger is often damaged due to sprain, at this time, it is necessary to reduce the patient’s hand activities and go to the hospital to fix the thumb in a plaster or a splint, and it can be recovered by itself after 3 weeks of fixation. 2. Topical ointment: patients with broken thumbs may lead to tendon damage, at this time you can use diclofenac diethylamide cream to smear the swelling to relieve pain. Thumb was broken vaguely pain is recommended to go to the hospital in time for treatment. Plaster splinting should be done by a doctor to prevent further damage to the function of the thumb.