Yep: Syphillis is one std that causes sores. They are called chancres. They can be located anywhere in the mouth. Go see a doctor and a round of antibiotics could clear up the whole problem. Just don't have any physical contact with anyone until you are cleared. Not a nice "gift" to give to others.
Answered 4/2/2016
4.9k views
Another: Oral herpes can also cause lesions in the mouth.
Answered 9/28/2016
4.9k views
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