Proteinuria during pregnancy is when there is more protein in the urine of pregnant women, and there is little protein in the urine of normal pregnant women. When the protein content in the urine increases and the urine is qualitatively positive for protein in routine tests, it is called proteinuria. Proteinuria during pregnancy can be seen in normal physiological conditions, but also in urinary tract infections as well as kidney diseases. Common causes and related recommendations are as follows: I. Functional proteinuria: also known as physiological proteinuria, it refers to temporary proteinuria that appears in healthy people. Mostly seen in young people, under the influence of factors such as strenuous exercise, fever, high temperature, cold and mental stress, the renal blood vessels become spasmodic or congested, resulting in increased permeability of the glomerular filtration membrane and a large amount of protein “leakage”. Functional proteinuria will disappear on its own after the trigger is removed, so it is also called reversible or transient proteinuria. Pathological proteinuria: 1, urinary tract infection: pregnant women with urine protein can be cultured for bacteria, if the proteinuria is caused by urinary tract infection, bacteria will be cultured and antibacterial treatment can be given; 2, pregnancy combined with nephritis: if proteinuria only occurs, the condition is mild, treatment is needed under the guidance of doctors, and drugs that do not reduce placental blood perfusion, such as methyldopa, hydrazidiazide, nifedipine, etc. are used. nifedipine, etc. However, if the blood pressure of pregnant women is above 150/l00mmHg at this time and accompanied by renal impairment, it is extremely dangerous to pregnant women and fetuses, so abortion should be done as soon as possible; 3. Hypertension: it is caused by renal vascular spasm and ischemia, which increases glomerular permeability. The more urine protein means the more ischemia of kidney and placenta, and should be immediately admitted to hospital for conditioning and medication.