I have Back pain
Oh no!  I'm so sorry.  Are you getting treatment?
Not yet, i have it It is divided into neck pain (cervical), middle back pain (thoracic), lower back pain
That sounds pretty serious.  I feel lower back pain is the worst.  Do you agree?
Yes because it is a common disorder involving the muscles, nerves, and bones of the back.
I've heard that the muscles and nerves are what make it so painful and affects your mobility.
Yes and The condition may be further classified by the underlying cause
What are some underlying causes?  
Well,  the pain believed to be due to mechanical problems such as muscle or joint strain
True.  Many people lift heavy things without thinking about the strain they are putting on their bodies.