The joint type allergic purpura is generally more serious, after the appearance of joint type allergic purpura need to be treated early, after active treatment may also be cured, patients do not need to worry too much. The cause of this disease is not very clear, and it may easily invade the small blood vessels of the human body, usually manifesting as joint pain, and may also lead to a bloody rash all over the body. If not actively treated, it may also involve the kidneys, leading to autoimmune deficiency disease, which is more difficult to treat and therefore more serious. The patient is usually easy to find out that he or she has arthritic purpura during the medical examination, usually accompanied by a more fearful psychology, but if the symptoms can improve after active treatment in the initial stage, there is no need to worry too much. The patient with arthritic purpura can apply anti-allergic drugs as prescribed by the doctor, such as cetirizine hydrochloride to relieve the symptoms and also to avoid involving the kidneys, while the patient needs to maintain a good state of mind during the treatment period, and should also go to the hospital for regular review, and try to reduce the number of contact with allergic substances to avoid causing skin allergy.