Core muscles and backache

Hi

Having a bit of a time with back ache at the moment, and running in parallel with joints clicking in wrists, arms and feet and legs (usually just one location affected at a time.)

Can MS lead to loss of core abdominal muscle strength that could be causing this?

Does anyone else get this, or can offer any advice? I’m fine as long as I stay vertical, but if I twist or anything I’m on the cusp of folding over in half in agony.

Hope everyone out there is as well as they can be.

Thanks.

Mr S