Which department should I visit for blistered and swollen lips?
Blisters on the lips are commonly caused by viral infections or “excess internal heat” (a traditional Chinese medicine concept referring to inflammatory conditions). When patients neglect local protection and hygiene, they become more susceptible to viral or bacterial infections. These pathogens often irritate the local tissue, leading to blister formation.

Which department should you visit for lip blisters accompanied by swelling?
For lip blisters with swelling, patients may consult either the Department of Oral Medicine or the Department of Oral Mucosal Diseases. Clinical manifestations such as blisters, swelling, ulcers, discoloration, erosion, crusting, or scaling on the lips all warrant evaluation in either of these departments, where appropriate diagnostic assessments and treatments can be provided.
Lip blisters with swelling may also be attributable to a viral infection; antiviral therapy—such as topical antiviral ointments applied directly to the affected area—is often indicated.
Erythromycin ointment is a topical antibiotic preparation that exhibits both antiviral and antibacterial activity. Its primary active ingredient is erythromycin, and it is commonly used to treat minor burns and infected ulcerative lesions.
We hope this information is helpful to you.