Some horror manga or more like gore gender ?

Try
- Feeding lamb (it's yaoi)
- dead tube
- Dokumushi
- Mai Chan's Daily Life

Oh YAH this is more to gore than horror

https://www.mangago.zone/home/mangalist/845544/

Here's my list to some gore/horror/psychological mangas

from the red frog, prison lab and Brutal: Satsujin Kansatsukan no Kokuhaku (this one literally made me feel sick)