What virus causes blisters that may appear around the mouth?

The virus that causes blisters that may appear around the mouth is called the herpes simplex virus (HSV). There are two types of HSV: HSV-1 and HSV-2. HSV-1 is the most common type and usually causes oral herpes, also known as cold sores or fever blisters. HSV-2 typically causes genital herpes, but it can also cause oral herpes.

HSV is a highly contagious virus that is spread through close contact with an infected person. The virus can be transmitted through kissing, sharing utensils or drinks, or touching the blisters caused by the virus. HSV can also be transmitted from an infected mother to her newborn baby during childbirth.

Once a person is infected with HSV, the virus remains in the body for life. However, the virus is not always active. In some people, the virus may only cause occasional outbreaks of blisters, while in others, it may cause frequent or even constant outbreaks.

There is no cure for HSV, but there are treatments that can help to reduce the symptoms and frequency of outbreaks. These treatments include antiviral medications, topical ointments, and lifestyle changes.