Why Did a Bump Form on My Lip?

A bump on the lips may be caused by herpes labialis, oral ulcer, thrush, or leukoplakia of the oral mucosa. If there are any uncomfortable symptoms, medical attention should be sought promptly.

The blisters caused by this disease generally grow on the lips and their surrounding areas, and the infection rate is very high, especially during cold and fever, menstruation, and other stages. Herpes labialis initially manifests as local skin flushing, accompanied by burning, pain, or itching. Then, dense clusters or several clusters of needle-sized blisters appear locally, followed by rupture, erosion, exudation, and gradual drying and scabbing.

The cause of blisters on the lips may also be oral ulcer, which is often caused by allergies, infections, fatigue, or lack of vitamins. It manifests as local defects on the oral mucosa covered with pseudomembranes, usually accompanied by pain.

Thrush is mainly caused by fungal infection, characterized by white patches resembling snow layers. It mainly occurs on the mucosa of the cheek and tongue and the mucosa of the lips, causing dry mouth, burning discomfort, and mild pain at the site of mucosal damage.

Various external stimuli are directly reflected in the oral cavity, and leukoplakia of the oral mucosa is a stimulus response. It mostly occurs on the bottom of the tongue. There is no discomfort in the early stages of onset, but intense pain may be present in cases of erosion or ulceration.