Most common among these is the oral herpes caused by two different strains of herpes simplex virus, HSV-1 and HSV-2.
Symptoms of oral herpes include fever, tiredness, muscle aches and irritability. Painful blisters appear on the lips, gums, in front of the tongue, inside the cheeks, throat and the roof of the mouth. These blisters might swell and finally burst resulting in bleeding. Oral herpes makes it difficult to eat, chew, drink and even do the talking. Oral herpes is a highly contagious disease that can spread from person to person whenever the blisters erupt. Often, this infection is associated with occurrence of high fever.
Transmission of infectious particles primarily occurs when the partner has wounds of open sores on their genitals. One can also contract an infection through oral sex if he has any injuries or cuts on the tongue, gums or in the mouth. Risk of transmission can also increase due to certain activities performed before or after giving oral sex. These include brushing the teeth, flossing, eating crunchy foods or any kind of dental work. Infection can also spread due to sharing of infected spoons, cups, toothbrushes, towels and even handkerchiefs. Oral herpes is often confused with canker sores that appear on the tongue. However, unlike oral herpes, canker sores are not contagious and disappear within days.