Sand paper is a particularly bad problem. I don't necessarily have to hear it, just seeing someone use it will make me get away ASAP due to fear of hearing it.

[–] [email protected] 4 points 1 month ago

There are many different types of synesthesia, misophonia being just one of them. Another is called mirror-touch, which has some symptoms related to seeing something, either IRL or on tv etc, and feeling the effects even though you shouldn’t be feeling them. Getting the effect of misophonia from just observing the use of something or an action could be an indication that you may have some form of mirror touch synesthesia as well.