How important antigen testing is in hsp in finding causative agent when it occurs in house wife with no obvious cause at home env.?

HSP: Some cases of HSP have been linked to vaccinations for typhoid, cholera, yellow fever, measles, or hepatitis b; foods, drugs, chemicals, and insect bites. Some experts also say that HSP is associated with the colder weather of fall and winter.

Not that helpful: If that is the correct diagnosis, you may never find the triggering cause. Speak with her rheumatologist to be sure the diagnosis is correct since it is a difficult diagnosis to make in an adult and needs acute, heavy duty meds.