Suddenly swollen a pustule on the top of the lip is considered to be caused by trauma, may also be the emergence of allergic dermatitis, folliculitis and other diseases.
1. Trauma, if the lips are usually hit by external forces or often bite the lips, may lead to lip tissue fluid oozing, so this symptom will appear.
2. Allergic dermatitis, some patients may be exposed to allergic substances may lead to angioneurotic edema, which may produce the symptom of a pustule suddenly swollen above the lips.
3. Folliculitis, if there has been a folliculitis, follicular inflammatory secretions gathered, may produce such symptoms.
Usually need to observe the swelling situation, if the pus bag is relatively large, it is recommended to actively seek medical attention.