Frequent swelling of the face may be nephrogenic edema (such as various types of nephritis), premenstrual tension syndrome, etc., which needs to be analyzed specifically. 1. Nephrogenic edema: various types of nephritis, such as acute glomerulonephritis, chronic glomerulonephritis, etc., due to a variety of mechanisms leading to a decrease in renal excretion of sodium and drainage, resulting in water and sodium retention in the body, which leads to an increase in the volume of extracellular fluid, and therefore facial edema, which may also be accompanied by renal function abnormalities, positive urinary occult blood and other manifestations. 2. Premenstrual tension syndrome: some women of childbearing age will have edema of the face, eyelids and lower limbs 7~14 days before the onset of menstruation, which is considered to be related to fluctuation of hormone levels in the body. There are many reasons why the face is often swollen, and it is recommended to consult a doctor for clarification in time, so as to exclude organic lesions and avoid delaying the condition.