Thanks for posting your query.
History of lumps or purpuric rashes and blood in urine suggests vassculitis or any autoimmune disease
. In such conditions blood vessels becomes inflamed and fragile and may bleed internally or present like red lumps on surface. It may cause abdominal or joint pain.It can damage vessels in kidney
causing blood in urine.
You are advised to visit your doctor and get blood tests to rule out any autoimmune disease.
Hope it helps.