I’ve had misophonia since childhood (although only in the past few years found out about the term, what a relief). I remember as a kid some of my family members would make fun and not listen to my requests to stop doing xyz or making such and such sound. As I got older, I simply described what I felt as physical pain. I asked my family members if they’d cut my skin slowly. I know, a horrible thought, but I think it made them stop making fun, got them thinking it may be real and they should try not to do what bothered me.