Swollen lips with a hard bag need to be treated according to its causes, such as allergic factors, herpes virus infection, mucous gland cysts, etc. After clear diagnosis, choose general treatment, drug treatment, surgical treatment and other ways to deal with it. 1. Allergic factors: Eating allergic foods, such as mango and seafood, can cause a swollen lip with a hard bag. Treatment needs to avoid allergens, and then use antihistamines, such as loratadine and cetirizine, as prescribed by the doctor. 2. Herpes virus infection: Herpes virus infection will also show a hard swollen lip, treatment is mainly based on anti-virus, such as interferon, acyclovir and so on. 3. Mucous gland cysts: often have the habit of biting lips may cause mucous gland cysts, should be corrected bad habits, if necessary, can choose to surgical excision. There are many reasons why the lips are swollen with a bag of hard, after the symptoms, it is recommended to go to the hospital in a timely manner to improve the examination, under the guidance of the doctor to take standardized treatment, not to treat privately, so as not to lead to adverse consequences, the use of drugs need to comply with the doctor’s instructions.