Allergic purpura and colds are two kinds of diseases, but they are self-limiting diseases, not necessarily recurring, but there is a certain risk of recurrence. 1. Anaphylactic purpura: the cause of the disease is not clear, it may be related to infection, immune dysfunction, genetic factors, etc., while diet, environment, etc. are the triggering factors. Since purpura is a self-limiting disease, it can be cured within 8 weeks and does not necessarily recur. For people with long-term infections and immune disorders, the chance of recurrence increases. Specific treatment drugs include prednisone, dexamethasone, loratadine and so on. 2. Colds: mainly caused by viral infections, some people with good physical condition can also be cured by themselves, so there is no need for special treatment. If the patient is healthy, the disease will not recur. In addition, autoimmunity, lack of sleep, rain, etc. are triggering factors for colds, and if the patient has the above causative factors for a long time, it will cause the recurrence of colds, which will affect the health of the organism. It is recommended that patients diagnosed with allergic purpura and colds adjust their mindset and strengthen their life care in order to promote the recovery of health. Appropriate exercise, balanced diet, and adequate sleep can help improve the body’s immunity, enhance resistance to disease, and reduce the recurrence rate of the disease. Specific disease diagnosis and treatment should be carried out under the guidance of physicians.