The best time to operate for pediatric tenosynovitis is between 6 and 12 months or 2 years of age, of course, the age of onset and the severity of the disease are inextricably linked, in addition, not all pediatric tenosynovitis requires surgical intervention, but in mild cases, it can be observed conservatively. If the onset of the disease is within 6 months of age, the symptoms are usually more severe, but because of the young age, massage or physical therapy can be performed first, and if the symptoms are not relieved, then surgery should be performed between 6 and 12 months of age. The age of onset is between 1 and 2 years old, and the thumb flexion angle is between 30° and 40°, it can be observed first, and if the symptoms continue to be unrelieved, it can be operated at about 2 years old. Pediatric tenosynovitis requires prompt medical attention to evaluate the indications for surgery and to receive targeted treatment according to the condition. If severe cases are not operated in time, the flexion and extension functions of the fingers will be affected, and even joint contracture may occur, leading to deformity.