Yes, ankylosing spondylitis does increase your risk of osteoporosis — a condition that causes bones to thin and weaken as they become more porous inside.

Decreased bone mineral density is a common complication of ankylosing spondylitis. This is especially true for those who've had the condition for a long time. But some studies suggest it can also affect those who've been diagnosed with ankylosing spondylitis for a shorter time — less than 10 years.

Although you can't change that you have ankylosing spondylitis, you can take steps to help reduce your risk of osteoporosis.

To help keep your bones strong:

• Exercise 30 to 60 minutes most days.
• Eat a balanced diet of nutritious foods, including adequate calcium and vitamin D.
• Don't smoke cigarettes or use other tobacco products.
• Limit the amount of caffeine and alcohol in your diet.
• Maintain a healthy weight.
• Maintain a healthy posture.
• Take steps to prevent falls, such as wearing low-heeled shoes.
• Have regular physical exams.

Studies also suggest that tumor necrosis factor (TNF) blockers — sometimes used to treat ankylosing spondylitis — may help maintain or increase bone density in the spine and hip. However, treatment with these medications doesn't appear to decrease vertebral fractures. More research is needed.

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Feb. 22, 2023 See more Expert Answers