Hi Jim. Your symptoms sound very similar to mine, including fairly rapid onset and worse pain during the day. For me, the burning peaks about late morning or early afternoon, then starts to subside so that I 'only' have numbness, some tingling, and mild painless shocks every few minutes at night. My neuro agrees that this is the opposite of what is typical. He says the cause is pre-diabetes/early diabetes (my fasting glucose and A1C were pre-diabetic, but my 2-hr OGTT was diabetic). However, my endo and primary doctor disagree and say the cause is unknown. The numbness is up to my ankles, but when the burning pain really gets going it can be almost up to my knees. I've been suffering for about 11 months, and am fairly new to this forum.