How can I relieve achy legs and feet?

I was recently re-diagnosed as having Secondary Progressive MS (SPMS) after around 23 years of Relapsing/Remissive MS

I am lucky to have recently had Functional Electronic Stimulation (FES) device fitted which helps enormously with my ability to walk.

However I am experiencing achy pains in my legs and feet. I take CBD gummies when I can and these seem to dull the pain.

Can any of you relate to this and recommend something to ease the pain?

Thank you