Swelling up a small bag on the lips to consider related to trauma, but also may be the development of allergic lipitis, herpes orofacialis and other diseases.
1. Trauma, if the lips have been hit by external forces, it may lead to local tissue damage and this symptom.
2. Allergic labiitis, some patients with allergic labiitis after the skin is stimulated by allergens, may produce stress changes, so there will be a small bag swollen on the lips symptoms.
3. Herpes on the lips and mouth, if herpes on the lips and mouth has appeared, herpes simplex virus invasion may lead to changes in the skin tissue, such symptoms.
Usually it is best not to often stimulate the skin, if there is obvious discomfort it is recommended to consult a doctor in a timely manner.