Repeated red spots of allergic purpura need to be handled through general measures, medication, and other treatments. 1. General measures: patients need to actively cooperate with the doctor to find allergens and remove disease-causing factors. At the same time, you need to elevate the part of the red spots, keep the local skin clean, avoid scratching, touching, friction. Secondly, during the onset of the disease, you need to rest in bed, avoid walking and activities too early or too much. 2. Drug treatment: patients need to use antihistamines under the guidance of the doctor, such as loratadine, cetirizine, chlorpheniramine, etc., to a certain extent, can effectively relieve the rash. If the rash recurs, patients need to follow the doctor’s instructions to use cyclophosphamide, azathioprine, tacrolimus and other immunosuppressants. 3. Other treatments: If the effect of conventional treatment is not good, or the condition of recurrent refractory purpura patients, you need to consider the plasma replacement therapy, can effectively reduce the symptoms. If you have a red spot on your skin, you should go to the hospital in time, cooperate with the doctor for standardized treatment, and strengthen your daily life management.