Lip swelling may have the following reasons: 1, traumatic blood blisters, due to trauma or accidental bites caused by, if there is no ulcer or vesicles and need to apply cold compresses, and then wait for the absorption of the blood blisters can be; 2, scalded blisters caused by the need to first use cold water until the blisters reduced after applying burn cream; 3, drug allergic lipitis caused by redness and swelling, need to use land Chlorotetracycline or Paracetamol, etc., desensitization medication partial No erosion, no special treatment; 4, photochemical labiitis, need to avoid light as well as the application of anti-allergic drugs, local application of sunscreen; 5, systemic medication, etc. without long-lasting swelling, can be considered a tumor, the need for biopsy or surgical resection; 6, there are many other diseases, such as adenolaryngitis, granulomatous labiitis, need to be symptomatic treatment.