Eat healthy and exercise regularly
Well one would be constipation, when you are constipated you tend to get lower and upper back pain. Your liver and or kindness can cause back pain, a strained muscle or popped out disk can cause back pain. Alot of things can..
The digestive system. It stores bile, which comes from the liver above it.
the answer is D, also known as glandular fever or mostly referred to the kissing disease when your immune system is fighting off that virus it causes your lymph glands to swell