For the disease henoch-schonlein purpura, what specialist doctor should be seen?

An immunologist: this disorder is an immune disorder, and a pediatric or adult immunologist is the most appropriate specialist to follow and treat a patient.

? specialist ?: I routinely diagnosed and treated these patients in my practice. If your primary doctor has experience with the disorder, I see no need for you to find someone else unless referred.At that point your primary doc has the best local knowledge of who would be available in your area. Because kidney issues sometimes come up, s/he may send you that way for followup.

Complex cases: Usually HSP does not require a specialist. Complex cases may need to involve a rheumatology doctor if joint pain does not improve, a kidney doctor to follow any problems with kidneys and rarely a surgeon if there is a complication called intusseception which affects the intestine Below is a helpful link on HSP http://www.niddk.nih.gov/health-information/health-topics/kidney-disease/henoch-sch%C3%B6nlein-purpura-hsp/Pages/facts.aspx