Dear Kareem please tell me the nature of your back pain
Kindly ask yourself the following questions:
Is your back pain worse after prolonged sitting or rest?
Does some minimal activity relieve your back pain?
Is the back pain worse at night?
Do you feel stiffness
in your back when you get up early in the morning?
How long does it stay ?
If your answer to most of these questions are yes then you are having inflammatory back pain.
As i can gather that you have knee joint pain as well.
If you have inflammatory back pain then you have a high chance of having a condition called SERONEGATIVE SPONDYLOARTHRITIS, which is also known as AKYLOSING SPONDYLITIS
. In this Rheumatoid factor
is usually negative.
Please consult a rheumatologist
at the earliest.