If you mean gas in the digestive tract, then yes it can.
In most of cases - Yes!
Many times pain in the lower back is caused by excessive strain, due to a prolonged physical activity, or one rapid but excessive motion that involves heavylifting or a rapid turn. Other more serious intestinal issues can cause lower back pain, so if it persists or is severe go see a doctor right away, especially of you feel the pain is not secluded to the muscles in your back.
it could be that the person has back spasm
It can cause lower back pain but not always
Most likely a kidney stone. Get an ultrasound to be sure.
I guess this can cause because you are not keeping your posture straight while climbing. Make sure you look right ahead with your chip straight and walk. Also take one step at a time climbing by taking large steps can cause pressure on lower back
Sciatica can range from a low pain, to a severe pain in the lower back. It can cause it to be painful to move your arms, legs or even just rolling over in bed can cause terrible pains.
I believe that shingles can cause lower back pain.
no but in can cause severe headaches like migraines
Many things can cause lower back pain such as a pulled muscle or even a kidney infection.
it could be your appendix.. get it checked out with a doctor.
None of the symptoms you mentioned are signs of pregnancy. If it continues or is severe, see a doctor.