Should read "paracetamol", which is the generic name that most of the world uses for the drug which in the US has "Tylenol" as a common brand name.

http://www.sciencedaily.com/releases/2014/07/140724094025.htm

A friend of mine had low back pain that developed over a few weeks. She found herself persistently leaning to one side. She tried massage but it didn't do anything. Got me to try and I couldn't do anything either. I never saw her again after that. She developed a massive infection from the underlying cause, multiple myeloma, and died within a month. The reason she was leaning to one side was because her vertebrae were being eaten away. (Most cases of multiple myeloma are diagnosed after emergency admission, even in countries like the UK with adequate preventive health care). So I tend to the "get it checked out" school of thought.