sleeping on your left side can greatly reduce reflux”. The NHS says that heartburn is common and not usually something to worry about.

9. Try sleeping on your left side Sleeping on your left side could improve acid reflux symptoms. A small 2015 study found that people sleeping on their left side with the upper part of their body ...

If you have chest pain on the left side, your first thought may be that you’re having a heart attack. While chest pain can be a symptom of heart problems, that’s not always the case.