There are many different causes of limb edema, which can be divided into physiological edema and pathological edema in terms of their onset. No matter what kind of edema will bring greater mental stress to the person concerned. Today I will tell you about the common causes and precautions for edema, hoping that it will be helpful to you. I. Common causes of physiological edema: malnutrition edema (a long time low-salt diet leads to a lack of some essential minerals in the body); postural edema (jobs that require long periods of standing at work, such as teachers, surgeons, etc.); premenstrual tension syndrome (edema symptoms that appear before the onset of menstruation in women); menopausal syndrome (the process of the body’s endocrine system re-finding its equilibrium) can also cause Idiopathic edema (unexplained edema in women aged 20-50 years); common causes of pathological edema: heart diseases, liver diseases, kidney diseases, endocrine diseases, vascular diseases and some malnutrition diseases, etc.; heart diseases cause edema mainly due to the diminished circulatory function of the heart, commonly due to chronic cardiac insufficiency; liver and kidney diseases cause Endocrine diseases are commonly caused by hypopituitarism, abnormal thyroid function, increased cortisol, primary aldosteronism and other diseases; drug-related edema: such as prolonged use of adrenocorticotropic hormones, testosterone, androgens, insulin and other drugs Vascular disease edema: edema of the peripheral vasculature due to a variety of causes (commonly surgery, trauma, malignant tumors, prolonged bed rest), the pathogenesis of which is due to peripheral vascular thrombosis, resulting in edema of the limb distal to the thrombus. Precautions: 1, no matter what the cause of edema, should maintain optimism; 2, to ensure good dietary habits and regular living; 3, do not take diuretic drugs to relieve symptoms; 4, the cause of treatment, it is recommended to seek help from the regular medical institutions; 5, the cause of unknown limb edema should not be arbitrarily “massage “especially vascular disease edema, massage if caused by thrombus dislodgement can cause serious diseases such as pulmonary embolism, and even life-threatening.