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.
This topic is about spinal stenosis of the lower back, also known as the lumbar area. If you need information on spinal stenosis of the neck, see the topic Cervical Spinal Stenosis. What is lumbar spinal stenosis? Lumbar spinal stenosis is a narrowing of the spinal canal in the lower back, known as the lumbar area. This usually happens when bone or tissue-or both-grow in the openings in the spinal bones. This growth can squeeze and irritate nerves that branch out from the spinal cord.