If you have ankylosing spondylitis (AS), you may be more likely to develop other conditions. Here are some common related conditions and their reasons: 1. **Osteoporosis**: AS can lead to inflammation and reduced mobility, decreasing physical activity and increasing the risk of osteoporosis. This makes bones fragile and more prone to fractures. 2. **Sleep Problems**: Pain and stiffness from AS can cause sleep difficulties. Poor sleep can worsen AS symptoms, including morning stiffness and discomfort. 3. **Depression and Anxiety**: Chronic pain and limited mobility can increase mental stress, leading to depression and anxiety, which also affect sleep and overall health. 4. **Foot Pain**: AS can affect joints and tendons in the feet, causing conditions like plantar fasciitis and Achilles tendonitis, leading to foot pain and discomfort. 5. **Cardiovascular Diseases**: Although rare, AS is linked to heart and blood vessel issues. Chronic inflammation may increase the risk of heart disease. 6. **Inflammatory Bowel Disease (IBD)**: AS is associated with IBDs like Crohn's disease and ulcerative colitis, though this is less common. 7. **Multiple Sclerosis (MS)**: The link between AS and MS needs more research, but both are immune system-related conditions. Knowing these risks can help you take steps to prevent or manage these conditions.