If you are between 16 and 45 years old and have persistent low back pain, you should consult your rheumatologist to exclude AS.Nonetheless, there are some characteristics of pain in this disease that may increase the probabilities of having AS.
Most of the patients with AS have inflammatory back pain. Pain usually presents as nocturnal pain that difficult the sleep. Patients wake up several times, and especially the patients feel very stiff early in the morning with a great difficulty to move. Pain improves during the day,and NSAIDs are usually effective to relieve pain.
Important: Don’t forget that back pain is one of the most common symptoms that will hurt any person along his/her life. Most back pains have nothing to do with AS. So, your rheumatologist is the target physician to gives you the right diagnosis.