? The first thing you should know about allergic purpura is that it is an immune vasculitis that can be triggered by infection or various allergic factors, mainly affecting the small blood vessels and capillaries in the body. The more widespread type is the cutaneous type, in which bleeding spots, bleeding patches, or microprotruding red rashes are visible on the skin and may be accompanied by local tissue swelling. This is caused by the involvement of blood vessels in the skin. The cutaneous form is the most common type of the disease. The disease can also be seen in the arthritic, renal (purpura nephritis or nephropathy), abdominal, and cerebral forms, all of which are caused by the involvement of blood vessels in various places. The first thing to note here: the skin type is very common, but it is the least harmful to the body. Therefore, parents do not need to worry too much about one more or one less blood spot on the skin of their children. Some parents pay extra attention to the rash on their child’s body and count it every day, worrying about one more dot and asking the doctor if the disease is getting worse. Why is there a new one? Here is an explanation: the course of allergic purpura is long, at least a month, an average of 3 months after the gradual stabilization. During this period, it is normal for the rash to recur, even when medication is used. The medication regimen generally does not require special adjustment unless other comorbidities such as abdominal pain, arthralgias, hematuria, etc. occur. During this process, parents should “hold their own” and not pass on their impatience to their children, or make frequent trips to the hospital to cause secondary infections. The second issue that needs attention is that the urinary routine should be monitored from the beginning of the disease until six months after recovery. Parents with kidney damage at the time of illness do not need too many instructions here, but mainly for those whose kidneys were “fine” when the disease first started. Some children may have urine tests for one or two months without problems, but after six months they may have urine tests for other reasons and find out that their urine is positive for occult blood or protein. Or some parents may say that the urine was fine at the beginning, but how come the problem appears later? According to the latest research at home and abroad, the kidney damage of allergic purpura appears at the beginning of the disease, but most of the early ones are hidden and cannot be detected by the general urine routine and kidney function, and can only be detected by the pathology or the renal tubular series (urinary NAG, urinary microalbumin, urinary retinol protein, urinary IgG, etc.). Most of these relatively “recessive” states turn “dominant” around 2 weeks after onset, i.e. positive urine protein or positive occult red blood cells. In some cases, the disease may not manifest itself until 1 to 3 months into the course of the disease, after all symptoms have disappeared. So we will add medication to protect the kidneys in early medication, and parents should realize that kidney damage already exists objectively since the diagnosis of the disease of allergic purpura, and its severity and duration need to be monitored and treated dynamically. The third problem: this disease is a chronic disease, especially the diagnosis of purpura nephritis, the course of the disease 3 months to six months, Chinese medicine treatment of this disease has special effects, but need to adhere to the medication and attention to contraindications.