What to do if your face is swollen? Generally speaking, different treatment methods should be adopted depending on the causes of swelling. A. Swelling caused by allergic reactions. Patients with allergies can be exposed to pollen and dust that can cause facial swelling. Patients need to stay away from allergens as soon as possible and can take small doses of oral dexamethasone tablets, loratadine, and 25mg of promethazine intramuscularly. Through drug treatment, reduce the allergic reaction in the body, so as to improve the facial swelling. Second, if the swelling caused by trauma resulting in facial soft tissue injury, can be reduced by local ice to reduce tissue exudation. 24 hours later, use hot amulet pack to apply externally to promote the absorption of swollen tissue. Generally after 5-7 days, the swelling of the face can slowly subside.