My child had hsp a month ago i'm checking urine and there is + blood sign, she has app on 27 th in hospital, should i wait?

Maybe: The presence of blood i the urine is common with HSP and usually indicates some irritation of blood vessels in the kidneys if the test was clear before and a new finding, the urine is visibly red, there is also protein in the urine, or this has progressed from a trace to a large amount, i would call in and see if they might want to do some confirmatory tests before your recheck are recheck earlier.