A wisdom tooth got infected. That already hurt. When I went to the dentist, they told me they had to cut open the gum around the root of the tooth. That needed local anasthesia, so I was given a little infusion of some pain killer at the infected area
I don't know what happened then, but somehow, the pain killer multiplied the pain hundred times. Maybe the fluid didn't reach my nerves and just build up pressure in the gum, making the infected nerve endings even hurt even more
I was sat down in the waiting area, with the expectation that the anastesia will start working. But the pressure build and build and it hurt more and more. My eyes got wet from how much it hurt. My jaw and my hands were shaking. My sight was flickering and I felt extremely dizzy. I genuinenly felt like my conciousness was fading away from pain
I told the nurse, she was concerned, the dentist took me in immediately, did the cutting without working pain killers (I didn't feel it though because there was soooo much surrounding pain) and I needed around 6 hours to lose the pain and to feel normal again