Which virus is known to cause sores and ulcers in mouth infections?

The herpes simplex virus is well-known for its role in causing sores and ulcers in oral infections, commonly presenting as cold sores or fever blisters on the lips and in the oral cavity. This virus can cause painful lesions that may recur over time, especially when triggered by factors such as stress or illness. It predominantly affects the mucous membranes of the mouth and face, leading to the characteristic symptoms associated with oral herpes.

While Coxsackievirus can also lead to mouth ulcers, particularly in conditions like hand-foot-and-mouth disease, it is less commonly associated with the recurrent oral lesions that herpes simplex virus typically causes. Epstein-Barr virus is primarily associated with infectious mononucleosis and may cause some oral manifestations, but it is not primarily understood as a cause of sores and ulcers. Human papillomavirus is associated with oral lesions but mainly with warts and potential links to cancers rather than the classic, painful sores typically caused by herpes simplex.