Spondylitis can manifest as lower back pain, as well as lumbar spine muscle pain, thoracic and back pain, cervical pain, and in severe cases, spinal deformities. Spondylitis is an inflammation of the spine due to various reasons, mainly characterized by recurring pain and stiffness in the two sacroiliac joints and the low back. Spondylitis causes pain and stiffness in the low back, preventing normal movement, and in severe cases, causing ankylosing joints and spinal deformities. In addition, in a few cases, spondylitis may invade the sternoclavicular joint and the costovertebral joints, and in cases where the costovertebral joints are invaded, chest pain and decreased breathing may occur. It may also irritate the nerves between the ribs, causing intercostal neuritis, which can be easily mistaken for angina and should be identified. When spondylitis occurs, you need to go to regular hospitals for regular checkups to prevent spinal deformation.