Half of the lower lip suddenly became swollen, which is relatively common in clinical practice. Specific how to treat is according to the cause of the targeted treatment, if it is due to lipitis caused by swelling, this situation is best anti-inflammatory symptomatic treatment. To local iodine volts disinfection, and then apply erythromycin ointment, or Pepto-Bismol ointment, through the anti-inflammatory effect will be able to gradually make the swollen lips gradually return to normal. If the lips are swollen due to allergies, this situation may be accompanied by other symptoms in addition to localized swelling of the lips. In this case, we need to carry out anti-allergy treatment, you can take vitamin C or desensitizing drugs, such as clinically common paracetamol, cetirizine and other drugs, through the inhibition of the body’s metabolic reaction or allergic reaction, will be able to gradually eliminate the swelling of the lips. Therefore, the lower lip suddenly became swollen, must go to the regular hospital to find the real cause of the disease, for systematic standardized treatment.