Search
Back pain is so common that most people shrug it off. A long day, a bad mattress, an old injury: there is usually an easy explanation, and most of the time it is the right one. Most back pain is mechanical, meaning it comes from muscles, discs and joints under strain, and it settles with time and sensible care.
Some back pain behaves differently, though. It shows up in younger adults, lingers for months, feels worst after rest and eases once you get moving. That pattern can point to axial spondyloarthritis, an inflammatory form of arthritis that mainly affects the spine and the sacroiliac joints where the spine meets the pelvis. It is very treatable, but it is also easy to miss, and many people live with it for years before anyone puts a name to it.
What Axial Spondyloarthritis Is
Axial spondyloarthritis is a long-term condition in which the immune system drives inflammation in the spine and sacroiliac joints. Over time, in some people, that inflammation can lead to new bone forming between the vertebrae, which reduces how far the back can bend and turn.
You may hear two related terms. Ankylosing spondylitis, now often called radiographic axial spondyloarthritis, is the form where changes are visible on regular X-rays. Non-radiographic axial spondyloarthritis has the same symptoms and inflammation but no clear X-ray damage, and it is usually found with MRI. Both are part of the same disease family, and both deserve care.
How Inflammatory Back Pain Feels Different
Rheumatologists pay close attention to the pattern of back pain, not just where it hurts. Inflammatory back pain tends to share a few features that set it apart from a strained muscle or a worn disc.
- It usually starts before age 45 and comes on gradually rather than after an injury
- It has lasted three months or longer
- Stiffness is strongest in the morning and can take 30 minutes or more to loosen
- It improves with movement and exercise but not with rest
- It can wake you in the second half of the night and ease once you get up
- Pain may alternate between the left and right buttock
Not everyone has every feature, and having some of them does not mean you have the condition. The pattern is simply a strong reason to have it evaluated instead of waiting it out.
Symptoms Beyond the Back
Axial spondyloarthritis is a whole-body condition, and some of its most useful clues show up elsewhere. People may notice pain where tendons attach to bone, such as the back of the heel or the bottom of the foot. Some have swelling in a few larger joints like the knees or ankles, or a whole finger or toe that swells up. Fatigue is common and real.
The condition is also linked with psoriasis and with inflammatory bowel disease, so a personal or family history of either is worth mentioning. It overlaps with the same family of conditions as psoriatic arthritis, which we described in When Psoriasis Becomes Joint Disease. One eye problem deserves special attention: uveitis, an inflammation inside the eye that causes a painful red eye, blurred vision and sensitivity to light, usually on one side. If that happens, seek care right away. It needs prompt treatment from an eye doctor and is not something to wait on.
Why It Is Often Missed
The early signs look a lot like ordinary back pain, and they often appear in people who are young, active and otherwise healthy. It is easy for patients and doctors alike to assume a strain. For years the condition was also thought of as mostly affecting men, and women with it were more likely to be told their pain was something else. We now know it affects women too, sometimes with a less typical pattern.
Another reason for delay is that early disease may not show on X-ray at all. A normal X-ray does not rule out inflammation, which is why MRI and a careful history matter so much.
How It Is Diagnosed
There is no single test that confirms axial spondyloarthritis. A rheumatologist puts the picture together from your history, an exam of how your spine and joints move, imaging and blood work. X-rays of the pelvis can show changes in the sacroiliac joints, and MRI can show active inflammation before any damage appears.
Blood tests may include inflammatory markers and a genetic marker called HLA-B27. Many people with the condition carry HLA-B27, but most people who carry it never develop the disease, so it is one clue among several rather than an answer on its own. Inflammatory markers can be normal even when the disease is active. If you want a refresher on what these labs mean, our plain-language guide to lab results walks through them.
Treatment and Daily Movement
The goals of treatment are to calm inflammation, ease pain and stiffness, protect posture and mobility, and keep you doing the things you care about. For many people, anti-inflammatory medications are a first step. When symptoms stay active, rheumatologists may recommend biologic medications or JAK inhibitors, which target specific parts of the immune response. Which option fits depends on your symptoms, your other health conditions and your goals, and that decision belongs with your rheumatologist.
Movement is a treatment in its own right. Regular exercise that focuses on spinal mobility, posture, stretching and breathing helps keep the back flexible and can ease stiffness. Physical therapists can build a routine that fits your body. Not smoking matters too, since smoking is linked with more active disease and worse outcomes.
Bring It Up at Your Next Appointment
If your back pain started young, has stuck around for months, is worst in the morning and feels better when you move, it is worth asking whether inflammation could be part of the story. Write down when it started, what makes it better or worse, and any related issues such as heel pain, eye inflammation, psoriasis or bowel symptoms. Bring that list to your next appointment and ask your doctor or rheumatologist whether axial spondyloarthritis should be considered. An answer can change how you feel for years to come.
Your Symptoms Matter
If you’re ready to take the next step toward clarity and relief, the team at AMS Rheumatology in Amarillo is here to walk with you, providing compassionate care, expert guidance, and personalized treatment plans designed to help you regain control, reduce discomfort, and improve your quality of life.