There is no authoritative information on how long it takes to stop the medication when the rash subsides, generally 3 days to 2 weeks after the rash subsides, the specific time varies from person to person. Hen Henoch purpura is a vasovagal allergic reaction disease, at present, there is no authoritative information on how long it takes for Henoch purpura rash to subside to stop taking medication. Generally speaking, it is believed that the allergic purpura rash can be stopped in about 3 days to 2 weeks, however, due to the different conditions and physical state of each person, the specific stopping time has individual variability, and can not be generalized. In addition, patients with purpura need to be followed regularly for a period of time after stopping the medication, mainly because the disease has a certain degree of recurrence, regular follow-up can prevent recurrent episodes caused by adverse effects. During the stabilization period, patients need to strictly manage their lives, pay more attention to rest and warmth, and conduct daily skin checks. It is recommended that patients with purpura should consult a doctor in a timely manner, follow the doctor’s instructions on how to use and stop the medication, and go to the hospital for regular follow-up.