Note that most people who have gas and bloating (and even other signs and symptoms) don't have colon cancer. 1  A feeling of needing to have a bowel movement, even if you don't.  A change in your bowel movements -- diarrhea or constipation, for example -- that lasts for more than a few days.
The tunnel is called the spinal canal. Lumbar spinal stenosis is a narrowing of the spinal canal in the lower part of your back. Stenosis which means narrowing, can cause pressure on your spinal cord or the nerves that go from your spinal cord to your muscles. Spinal stenosis can happen in any part of your spine but is most common in the lower back.
What is it? Lumbar canal stenosis, a narrowing of the vertebral canal in the lower spine, is a condition that is fairly frequent, especially in older people. Patients who have this condition complain of pain low down in the back and radiating into one or both legs.