RBC count in urine. In medical words.

My Brother is staying at Singapore.Two months back  he had full body check as a part of company insurance.Rbc count in urine showed 155. As per my knowledge normal range of RBC in urine 1-3.Consulted Doctors and had many tests too.Blood and urine tests all came negative.Doctors confirm that there is not Lupus Nephritis.Now again checked the urine test now rbs count is showing 10(still it's high) and protein content as .44gm.What doctors at Singapore have suggested is to decrease the content of salt and sweet and will do test again after six months.They are doubting it will be Glomerulonephritis. My Brother does regular exercise and his body is fit also.Recently some Butterfly like rashes has shown in body.But doctors are telling it is norlt related to this. Kindly Guide.Please excuse me if any mistake is there in medical words.