Rheumatism can also occur in children. Although the probability of having rheumatism is relatively low, children can also have rheumatism due to immune disorders. Rheumatism mainly includes rheumatic fever and rheumatoid arthritis. After rheumatoid arthritis occurs in children, they will have fever and joint pain, and the rheumatoid factor in their blood will be detected positively, and they need to be treated with non-steroidal anti-inflammatory drugs in time. Rheumatism is caused by rheumatic fever, which is a secondary immune response to streptococcal infections in children. Rheumatic fever in children causes wandering pain in the large joints, and children are tested for anti-O, which is significantly higher.