Rheumatoid arthritis does not usually cause body itching, which may be caused by overly dry skin or diseases such as atopic dermatitis. Rheumatoid arthritis: Rheumatoid arthritis is closely related to Group A Streptococcus B hemolyticus infection, with common symptoms of joint swelling and joint pain. Rheumatoid arthritis usually does not involve the skin, and does not cause itching. Dry skin: If the patient does not have skin abnormalities such as erythema and rash in addition to itchiness, it may be due to the patient’s frequent bathing and the use of strong cleansing power of toiletries, which leads to dry skin. Allergic dermatitis: Patients with allergies may experience itching and rashes after contact with allergic substances such as dust mites and pollen. Itchy body may also be seen in other causes, it is recommended that the patient to the regular hospital in a timely manner, follow the doctor’s instructions standardized diagnosis and treatment.