In general, the common causes of edema on the face are mainly the following: i. Patients with renal insufficiency can experience a large amount of water accumulation due to blocked urine excretion in the body, resulting in significant swelling of the face and limbs. At this time, patients can promote the excretion of urine to reduce facial edema by strengthening diuresis and actively protecting the kidneys. When allergic patients come into contact with dust, pollen and other allergens, the body will produce obvious allergic allergic reaction, which can cause obvious swelling of the face. Patients can take oral loratadine, intramuscular injection of promethazine and other anti-allergic drugs to reduce the allergic reaction in the body, thus relieving the edema symptoms on the face. If the patient’s allergic reaction is more severe, intravenous dexamethasone can be applied for anti-allergic treatment to promote the self-absorption of facial edema.