What to do when the lips are swollen with fever, you need to find out the reason first, it may be a fever resulting in decreased resistance, certain infectious factors lead to swollen lips, according to the type of infection for anti-infective treatment; it may also be caused by allergic factors, it should be timely anti-allergy treatment. 1. Infectious factors: common in bacterial infection and viral infection, under the stimulation of inflammation, can lead to local vasodilatation, congestion, will lead to the symptoms of lip swelling. For bacterial infections, sensitive antibiotics can be given, such as amoxicillin, cefixime and so on. For viral infections, antiviral drugs such as ribavirin can be given. In addition, high fever can be treated with oral ibuprofen and other drugs. 2. Allergic factors: local allergy caused by allergens, triggering tissue edema, in addition to swelling, usually accompanied by obvious itching symptoms, some patients may also have fever. It is recommended to get out of the allergic environment in time, and under the guidance of the doctor to give diclofenac tadalafil and cetirizine hydrochloride tablets and other medications. Swollen lips with fever is recommended to actively reduce the fever first, if the fever symptoms are not relieved, it is recommended to go to the hospital in time for a blood test, under the guidance of the doctor for treatment.