Henoch-Schoenlein purpura (HSP) is a disease that causes bleeding from small, inflamed blood vessels into the skin. The bleeding causes a red or purple rash called purpura. Other parts of the body may also be affected, such as the joints, intestines, and kidneys. It is most common in school-aged children, but can occur at any age.
Inflammation (swelling) in the blood vessels causes the symptoms. The cause of the swelling is not known. It may be a response to infection. The illness is often seen in children who had a cold a few weeks earlier. The antibodies made by the body to fight the cold may attack other cells in the body. Other theories are that medicines, insect bites, cold temperatures, chemicals, or some foods are related to the cause. No one knows for certain.
HSP is not an inherited disease, and it is not contagious.
The main symptom is a rash. The rash is often on the buttocks and legs as well as the backs of the elbows and arms. The rash may first look like hives, but usually it changes to purplish or brownish bruises within 1 to 2 days. There is almost always some rash on the ankles.
Other symptoms may include:
Your healthcare provider will ask about your child’s symptoms and medical history and examine your child. Tests may include:
There is no medicine that will cure this illness. In most cases, it lasts 4 to 6 weeks and doesn’t cause any lasting problems. Symptoms may come and go during this time. The older your child is, the more likely it is that they will have the symptoms again. Your child will eventually get better on their own.
Your child's healthcare provider may prescribe a steroid medicine, such as prednisone, to reduce inflammation in the intestine. The steroid may help control pain and bleeding in the bowel. Using a steroid for a long time can have serious side effects. Give steroid medicine exactly as your child’s healthcare provider prescribes. Your child should not take more or less of it than prescribed by your provider and should not take it longer than prescribed. Your child should not stop taking a steroid without your provider's approval. You may have to lower the dosage slowly before stopping it.
Most children recover from HSP completely and have no further problems. In rare cases, it may affect the kidneys. Your child may need to see your healthcare provider for blood pressure checks and urine tests every 1 to 2 months over the next 2 years to check the kidneys.
You can help relieve your child's symptoms with:
Follow your child’s healthcare provider's instructions. Ask your provider:
Make sure you know when your child should come back for a checkup. Keep all appointments for provider visits or tests.