Fifteen-year-old child rheumatoid arthralgia is serious or not, should depend on the situation, if the onset of the site is only mild pain, it is not serious, if the pain is intolerable, walking inconvenience, etc., to consider the seriousness of the disease, it is recommended to have rheumatoid arthritis in time to consult a doctor. Rheumatoid arthritis is a connective tissue inflammatory disease, swelling and inflammation, joint pain is a common symptom, generally not life-threatening, and there is a certain probability of controllable, daily life, if only minor pain, can pay attention to warmth and other measures to relieve pain. If the onset of repeated pain in the area, the patient can hardly bear, and even walking difficult situation, we should consider that the inflammatory symptoms have worsened, in the case of avoiding the joints are cold water stimulation or cold wind blowing, timely consultation, in the doctor’s help to clarify the cause of the disease, for targeted treatment. Rheumatoid arthralgia is more common in middle-aged and old-aged groups, but less common in adolescents, so if a fifteen-year-old child develops rheumatoid arthralgia, it is important for parents to pay attention to it, find the cause of the condition in time, and seek medical help in time.