Thank you, gcoe, for your reply.

Yes, I've had 2 Nerve Conduction Studies; they were a year apart, an EMG to rule out any muscular problem, lumbar spine Wikipedia reference-linkMRI to rule out any prolapsed discs or tumors pressing on a nerve root (as I noticed my left leg girth is smaller than the right), and a foot/ankle MRI. All these tests did not show any abnormality. I've had 2 x-rays as well to rule out tarsal coalition or heel spurs.

It's worth saying that this tingling sensation is most prominent when I'm sitting down. And when I raise my foot of the ground, it disappears. When I'm lying down on bed, it's not there. This makes me think it's a direct result of the deformity itself; when I press on the ground with my foot, the deformity leads to compression of a nerve. I'm wearing the orthotics at home, and I think it alleviates the condition a little.

I've had all the investigations I could have, and I visited a neurologist, 2 rheumatologists, and 2 orthopedic doctors. I know my condition is confusing, and I've tried almost everything. So now I think what's going to really help me is rehabilitation i.e. physiotherapy. At least I haven't tried this. And because I have no time for physiotherapy sessions at a clinic (my exams start in a month), I want to try it at home, if possible.

So my question is clear (I hope); if someone with a valgus deformity of the hindfoot visited you in the clinic, and complained of stiffness in the ankle and in the back of the heel, what type of exercises would you suggest to him?

Thank you.