Having achy left upper back pain by i think its due to how i sleep. whats the best remedies to fix this. hurts bad. cold or hot?

Back pain: Severe upper back pain from sleeping in awkward positions would be unusual. At this time I recommend applying cold alternating with heat intermittently and taking anti-inflammatory medications like Advil or Aleve. Applying liniment like bengay may help. If symptoms persist or worsen, see your physician for evaluation and testing.

You can use both and: what helps most. Also,NSAIDS ( Advil, etc) work by another mechanism to reduce inflammation & pain. If lasts more than 2 wks, see your doc.