Herpes labialises, commonly known as cold sores, can be a bothersome and painful condition. There are several synonyms for herpes labialises that are commonly used, including fever blisters, oral herpes, and herpes simplex virus 1. These terms all refer to the same viral infection that causes painful sores and blisters on or around the mouth. Other synonyms for herpes labialises include cold cores, lip sores, and canker sores. While there is no cure for herpes labialises, there are treatments available that can help reduce symptoms and speed up the healing process. If you experience frequent cold sores, it is important to talk to your healthcare provider about treatment options.