Some examples of mechanical causes of lower back pain causes such as:

• Sprain : Sprains are damage to the joints, most commonly ligaments, which usually occur when a vigorous movement but do not cause dislocation or fractures.A sprain leads to ligament strain or a injury ligament, both of which can occur due to twisting or improper lifting, lifting too heavy. Such movements can trigger spasms in the back muscles, leading to pain.
• Degenerative disc disease is a condition in which the components of the disc degenerate, creating abnormal movements of the ligament, joints, bone surface of the vertebra ... causing back pain. This is the most common and most recently studied which is cause of low back pain. A herniated or ruptured disc may occur when the disc is pinched and bulged or broken, causing low back pain.
• Neuropathy is a condition caused by compression, inflammation  or damage to nerve roots in the spine. The pressure on the nerve root can cause pain, numbness or tingling sensation that moves or spreads to other areas of the body in the path of the nerve. Neuropathy may occur when the spinal stenosis or herniated disc or rupture of the disc compresses the nerve roots.
• The sciatic nerve is the longest and largest nerve in the body, running from the waist area, through the pelvic area, to the buttocks and down to the feet. When the nerve is pinched, causing pain along the nerve is usually occurs on one side of the body, affecting totally or partially hips, buttocks, thighs, calves, feet should be called sciatica.
• Injury, such as playing sports, a car accident or falling can damage tendons, ligaments or muscles leading to low back pain. Injury can also cause excessive spinal compression, which can cause the disc to rupture or become a hernia, putting pressure on any nerve originating in the spinal cord. When the spinal nerves are pinched and stimulated, back pain and sciatica can occur.
• Spinal stenosis is a narrowing of the spine that puts pressure on the spinal cord and nerves that can cause pain or numbness when walking and over time leads to weakness in the legs and loss of sensation.
• Arthritis diseases such as rheumatoid arthritis, spine inflammation, spondylitis, can also cause lower back pain.
• Fibromyalgia syndrome is a chronic painful condition in the muscles, ligaments, tendons and software bodies of the body. Fibromyalgia is often accompanied by feelings of fatigue, insomnia, or depression but no physical damage to muscles, bones or joints.