what causes blood blister on bottom lip
Blood blister on lip causes. Blister on lips can occur for a number of reason and some cases are due to a certain health-related condition. Some of the known cases include lip or mouth cancer, smoking, cold sore or sexually transmitted disease (STD).
Herpes simplex virus infection causes so-called cold sores, which are typically located on the lips, but they can also occur on the gums. Among the sexually transmitted diseases (STDs), the chancres of syphilis can occur as mouth sores. Medically Reviewed by a Doctor on 9/16/2016.