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Can I infect my partner with a mouth ulcer?

It is possible to transmit an infection through contact with blood and certain other body fluids. Some infections may also require an entry point, such as a small lesion on the partner's genital area. To be safe, it is recommended to undergo testing for precautionary measures, especially if it has not been done before. Generally, a simple mouth ulcer does not typically cause problems unless there is a presence of a contaminant.