From time to time, you may feel discomfort or even pain when trying to strain the muscles. You may wonder, but it may be the first sign of the Ankylosing Spondylitis. Not only limbs may suffer, but our back. Usually, it’s impossible to control a muscle strain, so there is no way to prevent the back pain. Everyone who faces this problem must remember that Ankylosing Spondylitis is caused by the inflammation of the spine. Other causes describe the regular back injury.