Itchy joints in children may be related to contact dermatitis, cholinergic urticaria, eczema and other skin diseases. 1. Contact dermatitis: If the child’s joints come into contact with allergenic substances such as plasters, it can cause the body to undergo an abnormal immune response, leading to itchy skin symptoms. 2. Cholinergic urticaria: due to exercise, heat, mental stress, eating hot drinks or alcoholic beverages, the deep body temperature rises, prompting acetylcholine to act on mast cells and the onset of the disease. Self-conscious itching, burning, sometimes only severe itching without skin lesions. 3. Eczema: emotional tension, external stimuli and other internal and external factors, can lead to local inflammation, in the skin erythema on the basis of papules or mounds, itching intense. There are many other reasons for children’s itchy joints, parents are advised to take their children to the hospital in a timely manner, to clarify the cause of the disease, and standardized treatment under the guidance of the doctor.