Understanding Dual Cold Sores: Causes, Risks & When to See a Doctor

It is not typical to have two cold sores on your bottom lip at the same time. Cold sores are caused by the herpes simplex virus, which usually only causes one sore at a time. If you have two sores, it is possible that you have a secondary infection, such as a bacterial infection. It is important to see a doctor to get a proper diagnosis and treatment.