Urine erythrocytes 28.2/ul suggest hematuria, divided into physiological and pathological two. Physiological can be seen after strenuous exercise; pathological can be roughly distinguished according to the type of erythrocytes in the urine, mainly including homogeneous erythrocytes and non-homogeneous erythrocytes, including urinary hemorrhage or renal inflammatory lesions. 1. Physiological: strenuous activities may cause transient minor bleeding in the urinary system, which may return to normal after reduced exercise or rest. 2. Pathological: homogeneous erythrocytes mean that the morphology of erythrocytes in the urine is not very different, and polymorphic erythrocytes often account for less than 50%, which can be seen in urinary hemorrhage in places other than glomeruli, such as urinary stones, injuries, and hemorrhagic cystitis. Non-homogeneous erythrocytes mean that the morphology of the erythrocytes in the urine varies greatly, and the proportion of polymorphic erythrocytes is often >80%, which is seen in glomerulonephritis, nephrotic syndrome, etc., and is often accompanied by proteinuria. There are many reasons for elevated erythrocytes in urine, so it is recommended that patients seek medical attention in a timely manner to identify the cause and then follow the doctor’s instructions to deal with it actively.