Arthritis is one of the main causes of excruciating back pain.
But now, thanks to scientists at Harvard University, you can do a simple test to see if your back pain is the result of this medical condition.
You just have to do this simple movement.
If you hear a cracking sound, your spine is already 96% affected by arthritis.
This test was done on 45,967 people with an accuracy of 99.9%.
Find out more here: