There are many reasons why the lips swell up, such as mosquito bites, sebaceous cysts, folliculitis, trauma, allergies and other reasons.
1. mosquito bites: lips by mosquito bites, toxin stimulation may cause the lips to swell up a bag, most of the accompanying itching and other symptoms.
2. Sebaceous cysts: local sebaceous gland ducts are blocked, the secretion can not be discharged in time, the formation of sebaceous cysts, can also cause the lips to swell up a bag.
3. Folliculitis: Folliculitis caused by secondary bacterial infection of localized hair follicles on the lips can also lead to a swollen lip, accompanied by redness, swelling, pain and other symptoms.
4. Allergy: allergy to food and drugs or other substances caused by localized eczema, dermatitis, drug rash and other allergic reactions, can also lead to a swollen lip.
Lips swollen a bag, there may be other reasons, you need to go to the hospital to check, clear cause and follow the doctor’s instructions for treatment.