The tiny pimple at the edge of your lips is often referred to as a cold sore or a fever blister, which is usually caused by the herpes simplex virus (typically HSV-1). However, if it's just a small bump without the characteristic symptoms of a cold sore, it could also be a common acne pimple or a mucous cyst.
Cold sores can be quite painful and may cause discomfort because they occur in a sensitive area. They often present with a tingling