Pain and stiffness. Constant pain and stiffness in the low back, buttocks, and hips that continue for more than three months. Spondylitis often starts around the sacroiliac joints, where the sacrum (the lowest major part of the spine) joins the ilium bone of the pelvis in the lower back region.
Bony fusion. Spondylitis can cause an overgrowth of the bones, which may lead to abnormal joining of bones, called "bony fusion." Fusion affecting bones of the neck, back, or hips may impair a person’s ability to perform routine activities. Fusion of the ribs to the spine or breastbone may limit a person's ability to expand his or her chest when taking a deep breath.
Pain in ligaments and tendons. Spondylitis also may affect some of the ligaments and tendons that attach to bones.
Tendonitis (inflammation of the tendon) may cause pain and stiffness in the area behind or beneath the heel, such as the Achilles tendon at the back of the ankle.
What to eat to fight Spondylitis..
Omega 3 fatty acids,
Fruits and vegetables,
Whole foods and grains,
Reduce intake of sugar, sodium and fat,
Limit or avoid alcohol
Start a low starch diet.
Apart from this some more nutrients may be required depending upon mild, moderate, or severe damaged situation.