I tried it once a few years ago and got it again this time, and it does seem like my jaw got a little smaller! I do feel like it became slightly slimmer.. though it might just be in my head lol But when I chew something tough, I get this tingling, prickly feeling ㅠ I got it in the first place because I put too much force on my teeth while sleeping and clench hard, but it seems okay
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