Due to the long-term use of hormones, children with purpura nephritis have low body resistance, so they are prone to infections. In order to avoid infection, the infection must be completely removed, but a more important measure is to improve the immunity of the child. One is to passively improve immunity, such as the use of gammaglobulin, thymidine, plasma transfusion, etc. This method has an immediate effect, the effect is precise, but because this is a foreign immunity, the maintenance time is short, easy to make the child “crutches”, for the child combined with serious infections It is generally advocated that during the recovery period of purpura nephritis, you can intermittently take some oral medications that can actively improve your child’s immunity to prevent infection and avoid the recurrence of nephritis.