The symptoms of thumb fracture are as follows: 1. local swelling: after the fracture occurs, the bone marrow cavity oozes blood, plus the surrounding soft tissue bleeding and tissue fluid exudation, the thumb will appear swollen, thickened, and even subcutaneous petechiae, purple spots, as well as tension blisters, tension blisters, etc. 2. pain: after the thumb fracture, there will be resting pain at the fracture site, activity pain, that is, pain when flexing and extending the thumb The pain will be aggravated by pressing the thumb around, back and forth, and by squeezing the thumb and doing a longitudinal squeeze. 3. Bone rubbing sound: A clicking bone rubbing sound can be heard at the fracture site when moving the thumb. 4. It is also called osteochondrosis.