Computer Chair.

[Mooshie1956]

Not quite photography but close enough as I need to sit on one to edit my photo's.
I bought a gaming chair about 3 years ago, but to be honest I've never really felt comfortable in it, anyway recently I've been getting pains in my tail bone after sitting in the chair for an hour or so, so does anyone have any recommendations for a nice comfy chair that isn't like sitting on a plank of wood.

[Lighning Fan]

Have a look at a quality second hand office chair - I got an RH Logic 400 for a very reasonable price - it has multiple ranges of adjustments including pump up lumbar support. They tend to be less well known than Hermon Miller so offer second hand better value imo.
Specialist office chairs are designed to provide support for people using the chair for extended periods of time. If you have an office supplier nearby you could always see what they have to offer and try a few models out