If a pregnant woman has high erythrocytes in her urine, it is recommended to go to the hospital for an erythrocyte phase examination or a urinary ultrasound to clarify the possible causes. 1. Diseases such as glomerulonephritis and nephritis can present with high erythrocytes and may be accompanied by increased protein content in the urine. The red blood cell count may be elevated due to kidney disease. 2. Infectious red blood cell elevation can also occur when urinary tract infection occurs. Erythrocyte phase examination can see predominantly homogeneous erythrocytes, while the number of white blood cells and bacteria in the urine routine can be elevated manifestations, not accompanied by elevated urine protein. The patient may have symptoms such as urinary frequency and urgency, and further bacterial culture tests are needed to confirm the diagnosis.3. If there are urinary stones, there can also be an increase in the number of red blood cells, mostly accompanied by pain in the lower back and abdomen, and an ultrasound examination of the urinary system is needed to clarify the presence of stones.