Mild patients with allergic purpura nephritis can usually be cured in about 2 months, while severe cases usually take half a year or even longer. Allergic purpura nephritis is caused by bacterial and mycoplasma infections, patients will have proteinuria, hematuria, etc. At present, the main use of hormonal drugs, immunological agents, etc., symptomatic treatment, such as the condition is relatively mild, the general patients in the treatment of two months, can be gradually cured and recovered. If the condition is more serious, the kidney function decline is serious, the treatment time will be longer, need about half a year, some patients even need a longer time, and some patients will be transformed into chronic nephritis, so the specific recovery time needs to be combined with the condition, treatment and so on to determine. Therefore, the specific recovery time needs to be determined by the condition and treatment. It is recommended that patients with purpura fulminans nephritis go to the hospital in time and follow the doctor’s instructions, so as to avoid delaying the condition.