1. Symptoms of congenital stenosing tenosynovitis There is usually an inability to straighten the thumb after birth; others can break the thumb straight for him, but there is a relatively high resistance. There is sometimes a popping sound. There are also times when the thumb is in extension and cannot be bent, which is relatively uncommon. Careless parents often find it only after the age of 1 year. 2. What causes As with tenosynovitis in adults, thickening of the tendon can be found during surgery, creating a jam at the narrow tendon sheath, so the finger cannot move. It is estimated that abnormal edema occurs in this area during the development process. 3.Can it be cured? The cure rate is 100%. Don’t worry. 4.How to treat Children have great plasticity. There is no need to be busy with surgical treatment, conservative treatment can achieve a high success rate. Help your child to move the thumb frequently, straighten it passively and correct the bent condition. It is a good idea to make a splint-like thing to hold the thumb in a straightened position during the day. The easiest way to do this is to use a small wooden spoon with ice cream and some band-aids to hold it in place. Each parent can come up with their own suitable solution. Especially at night, it should be fixed on. During the day the child plays, it may be loose, but of course it is not necessary to be fixed 24 hours a day, all the time. 5.When do you need surgery Generally, with the above conservative treatment, the problem can be solved within 2-3 years of age. If you still can’t straighten after 2-3 years old, you can consider surgery. General anesthesia is required. There is no evidence that general anesthesia affects intelligence. The surgery is simple, and loosening the tendon sheath is sufficient. There is a potential risk of damage to tendons and nerves.