Herpes simplex is a viral disease that is caused by the herpes simplex virus. Infections can occur on various parts of the body. Oral herpes involves the face or mouth. It may result in small blisters in groups often called cold sores or fever blisters or may only cause a sore throat. Genital herpes, often known as herpes simply is another types of herpes.
Herpes virus causes painful sores on lips, gums, tongue, mouth, and inside the cheeks. Herpes labialis, also known as cold sores, is the infection caused by the herpes simplex virus that affects primarily the lip. It causes a burning sensation on the lips.