A year ago left leg went tingly. no symptoms since but when body temp rises shower/weather heel tingles. scared of ms but negative brain and spine mri?

Other neuropathy: There are many other causes of neuropathy that should be investigated. MS is feared, but (fortunately) VERY rare - you are more likely to have diabetic neuropathy (esp with negative tests so far) or neuropathy from another cause. Follow-up with your neurologist; relay your symptom & association with body temp. Perhaps they'll get to a diagnosis. Alternatively, use HealthTap Prime. Good luck & thx.