Hello, thanks for posting in HCM.
Fasting blood sugar below 100 means you are non diabetic. As your FBS value is 75, you are not a diabetic.
This test was done because the burning sensation you are feeling in leg is caused due to neuropathy of which
diabetes is the most common cause.
So as your diabetes has been ruled out, there are other causes like Vit B12 and Vit B6 deficiency,
hypothyroidism and many more.
You will require detailed physical examination to look for other causes and suspect for any other cause for burning foot.
It will be useful to consult your doctor and do some
blood test like
TSH to look for thyroid and meanwhile you can start
multivitamin capsules rich in B12 and B6 vitamins.
I hope i have answered your query well, if you have any questions kindly write back to me.
Thank you