Yep - Dr Google decides that most things are due to a brain tumour

There are a lot of nerves through out the body so sometimes 1 can get a radiation of sensations. If it goes once you move, it's probably nothing serious other than continuation of nerve 'damage'. I have background sciatica this week down the outer R leg around the knee, I know that I don't bend properly when gardening.
Is there anything in the day that you could alter, i.e. your seating position, posture when walking: do look at your foot wear too. As we age we need more support in the insteps and ankle area so flip flops should be for occasional use. When did U last change your mattress ............. as oestrogen levels drop, muscles may become lax = aches and pains. Swimming is supposedly helpful but quite honestly, I can't be bothered

We aren't designed to run. Jogging short distances when we chase after our grub or away from the sabre toothed tiger mayB but long distances . Nope.
Have U had any recent X-rays - cervical spine downwards? Which area is the physiotherapy treating and do you have homework? It will depend on which nerves are affected as to which 'root' is causing an altered sense of sensation.