What is the difference between a yeast infection and an STI?

Yeasts are naturally found on the body. Sometimes they overgrow and cause redness, soreness and itching. In this case they can be treated to reduce the symptoms. They remain present in the body and it is not possible to remove them completely. They are not sexually transmitted.

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Sexually transmitted infections are not naturally found in the body. They are passed through sex. Those that can cause ill health (such as chlamydia, gonorrhoea, HIV and syphilis) should be treated.