Is it bad for your neck/back to sleep without a pillow???
I just got this fiberbed thing put on top of my mattress, and it’s really puffy at the top where I’d put my pillow, so I just don’t use a pillow at all anymore. But I woke up with a stiff neck and I"m wondering will it affect me more than that.

I have back/neck problems that are worse when I use a pillow, so no pillow for me. If you try a really flat pillow it may be enough considering how puffy you mattress topper seems to be. It will depend on your sleeping posture.
For me no.
IT IS !! really bad 4 ur neck or back ..
let me give u an example .. our teacher!! lol !! .. when she was little .. she always sets without a pillow in her back ..
by a result .. when she grow up … her back right now isn’t straight .. u know like normal people ..
since that day .. and she was telling us this story over and over and over again ..
she want’s our best huh ?? hehe
no they say to sleep with out a pillow isbetter then sleeping with a pillow. sleeping with out a pillow is better on the neck and back…