Children with inability to straighten their thumbs need to consult orthopedics, neurology, rheumatology, etc. depending on whether there are other manifestations. 1. If there is congenital deformity of the thumb joint, or a combination of joint popping and joint enlargement, it is necessary to be alert to the presence of congenital deformity and stenosing tenosynovitis, etc., and consult orthopedics. 2. If there are sensory and motor disorders, such as loss of superficial and deep sensation, paralysis, etc., it is necessary to be alert to intracranial lesions, spinal cord lesions, etc., and need to go to the Department of Neurology for consultation. 3. If there are morning stiffness, fever, mouth ulcers, recurrent skin rashes, etc., it is necessary to be alert to whether there are rheumatic diseases, such as juvenile idiopathic arthritis, systemic lupus erythematosus, etc., and it is necessary to go to the Department of Rheumatology and Immunology for consultation. Parents should choose the appropriate department according to their children’s symptoms or consult the hospital’s guidance office, and actively cooperate with the physician for examination.