Foamy urine can be categorized into physiological and pathological causes. Physiological foamy urine is a normal phenomenon, no need to control the diet as well as dietary taboos, etc.; pathological foamy urine people are not recommended to eat high protein, high sugar, spicy and greasy food. 1. Physiological foamy urine: such as after strenuous exercise, no need to control diet and dietary taboos and so on. 2. Pathological foamy urine: pathological foamy urine mostly refers to proteinuria, it is not recommended to eat high protein food, such as lean meat, eggs, milk, etc. Patients with foamy urine have decreased glomerular filtration function, etc., they should reduce the intake of high-protein food, so as not to aggravate the burden on the kidneys. Patients with diabetic nephropathy should reduce the intake of high-sugar foods and strictly limit the intake of staple foods such as steamed buns to avoid further aggravation of nephropathy. Foamy urine patients are advised in principle to have a light diet to avoid the stimulation of the kidneys by spicy and greasy foods, and can consume low-salt, low-protein, vitamin-rich foods, such as apples, bananas, and whole wheat bread. Foamy urine patients are advised to go to the hospital in time to improve the relevant examination and symptomatic treatment under the guidance of the doctor.