There are many causes of facial swelling, not all cases are suitable for hot compresses. 1, if it is caused by trauma or tooth extraction, the first cold compress should be applied locally within 24 hours after the trauma to reduce edema and relieve pain. 24 hours later, you can use eggs or hot towels hot compresses to activate blood circulation and remove blood stasis, and to promote the absorption of effluent. If the face is swollen at the same time, the face has trauma, this situation can not be localized hot compresses, to avoid causing infection; 2, gingivitis, periodontal abscess and other inflammatory diseases caused by facial edema, in addition to swelling is accompanied by pain, this situation is not recommended hot compresses to avoid aggravation of the pain symptoms; 3, renal disease, long-term use of hormones in the body due to metabolic abnormalities, water and sodium retention caused by edema, the case of hot compresses with an egg often In this case, hot compress with egg is often ineffective, and symptomatic treatment should be given after clearing the cause of the disease; 4. Facial swelling in patients with oral cancer and nasal cancer is mostly caused by tumor factors, and hot compress cannot be applied locally in this case. Therefore, it is necessary to clarify the cause of facial swelling and avoid aggravating the condition by applying hot compress blindly.