Cold sores around the lip are caused by viruses, in which some ulcers are a form of herpes.
In which some ulcers are a form of herpes. Cold sores around the lip are caused by viruses.
Cold sores around the lip are caused by viruses. In which some ulcers are a form of herpes.
Cold sores around the lip are caused by viruses. In which some ulcers are a form of herpes.