What could be the cause of tingling/burning in lower legs that only sets in in the evening. MRI, emg, nerve conduction tests all normal. B12 normal.

? Diabetes Mellitus. which is one of the most common basis for paresthesias/neuropathy & sometimes becomes a problem well before DM is recognized. Look up neuropathy on Google, study: https://www.healthtap.com/#user_questions/130706 & https://www.healthtap.com/#user_questions/1510334 for background & get HbA1c; optimal HbA1c <5.0%. Go HFLC, study: DietDoctor.com, my answers, optimize NMR lipoproteins, get SBP <120mmHg.