Herpes is caused by a virus. There are two types of herpes: herpes simplex virus-1 and herpes simplex virus-2. You can get both types by having sex. The symptom of both types of herpes is a group of small sores or blisters that hurt. Sometimes the sores cannot be seen. Herpes is usually spread by coming in contact with the sores. Sometimes herpes can be spread even when the sores are gone. Medicine can be given to make the sores go away faster, but the person will have the virus the rest of their life.
The picture at left is an example of someone with anal herpes lesions. Some people have an outbreak of sores on a regular basis.
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