For a little over a month I have these pins and needles pain that occur mainly on my entire back but it is also evident on my chest, buttocks and the inside of my lower legs. The pain only occurs when my body temp is elevated through mechanical means, such as a heated room, sun and exercise. It immediately disappears when my body cools down. So far I have been to a GP, Dermatologist, and a Neurologist. I have had complete blood work, MRI of skull and neck, ECG, Carotid artery test. Nothing has shown up that would explain this pain