spondylitis pain

How Long Does Ankylosing Spondylitis Pain Last? An ankylosing spondylitis flare-up may cause chronic back pain over time. You may feel dull to burning pain on both sides of the lower back, buttocks, and hips. Chronic pain can last for 3 months or longer. Can ankylosing spondylitis cause severe pain? Ankylosing spondylitis (pronounced ank-kih-low-sing spon-dill-eye-tiss),