My 3 year old daughter for the second time had blood and leukocyte a in urine, sent urine sample to lab and results showed no infection. Daughter is otherwise healthy. She did just have 4 days of unexplained hives all over her body. Her doctor said it was something viral.
Hives or urticaria is some kind of allergy if I understood you correctly, I can not see your daughter, but you should know if it was viral rash, which appeared when temperature fell down, and it was small sports then it can be herpes virus of 6 type. But if it was big blisters on the skin it means urticaria and we should discuss this. I need more details about rash. Also, please tell me how much leukocytes and red blood cells in urine, if its small amount 10-15 it means your daughter can suffer from metabolic nephropathy, you should do ultrasound of kidneys and give to her some diuretic plants for excretion of salts. You should also give analysis of 24 hours urine for salts, or write what your daughter eats every day/ If she likes chocolate, juices from markets, or you give to her often peas, Rama, chicken soup she can suffer from sodium oxalate, in any case give to her more water 1-1,5 l every day, I will wait more details