If the patient currently has swollen feet and pits after pressing, the patient is considered to have heart failure. If it is triggered by heart failure, it is suggested that the patient should combine diuretic and vasodilator treatment, for example, furosemide can be pushed intravenously first, and further clarify whether there is heart failure at present, BNP and cardiac ultrasound can be checked; hypoalbuminemia or hypothyroidism may lead to lower limb edema, in addition, people with endocrine disorder can also have lower limb edema. Some women have edema related to menstruation, which is considered to be premenstrual tension syndrome. In some cases, lower limb edema may occur for unknown reasons, which is called idiopathic edema, but liver function, kidney function and heart function should be checked first to exclude the most common diseases that can cause lower limb edema.