As the directors of “Inside Deep Throat” seem intermittently aware, Gerard Damiano’s $25,000 fellatio flick was important only because of what it represented and what it unleashed.

They can appear on the inside of the cheeks or lips, but they can sometimes affect the back of the throat and tonsils. Read on to learn about what can cause a canker sore in the throat.

Both types of tests require using a swab to collect mucus from inside the throat for testing. “The culture takes longer but can sometimes catch strep infections missed by the rapid swab test ...