If you’ve been living with chronic back pain, you’ve probably heard all the usual explanations.
“It’s just poor posture.”
“You’re getting older.”
“You probably strained a muscle.”
While those may be true for many people, they’re not the whole story.
Not all back pain is created equal. In some cases, persistent back pain can be a sign of an autoimmune condition called ankylosing spondylitis (AS)—a type of inflammatory arthritis that primarily affects the spine and sacroiliac joints, where the spine connects to the pelvis. One of the biggest challenges with ankylosing spondylitis is that it often goes undiagnosed for years. Because symptoms tend to develop gradually and may resemble common mechanical back pain, many people don’t realize they’re dealing with chronic inflammation rather than a simple orthopedic problem. The earlier AS is recognized, the sooner treatment and lifestyle strategies can begin to protect mobility, reduce inflammation, and improve quality of life.

What Makes Ankylosing Spondylitis Different?

Most back pain is considered mechanical, meaning it’s related to muscles, ligaments, discs, or joints that have been strained or injured.
Inflammatory back pain behaves differently. Instead of worsening with movement, it often improves with activity. Rather than feeling better after a good night’s sleep, many people with ankylosing spondylitis wake up feeling especially stiff. Symptoms are often worse first thing in the morning or after sitting for long periods and gradually improve as the body begins moving.
That pattern is one of the most important clues.
Inflammation tends to create stiffness after periods of rest, while mechanical injuries usually become more painful with increased use.
Recognizing that distinction can be the first step toward receiving an accurate diagnosis.

Early Signs That Shouldn’t Be Ignored

Ankylosing spondylitis often begins subtly.
The earliest symptom is usually persistent pain in the lower back or buttocks that lasts for several months.
Some people notice discomfort alternating from one side to the other, reflecting inflammation around the sacroiliac joints.
Other common symptoms include:

• Morning stiffness lasting longer than 30 minutes
• Pain that improves with movement but not with rest
• Symptoms that wake you during the second half of the night
• Reduced flexibility in the spine
• Fatigue that seems out of proportion to your activity level

Because these symptoms develop gradually, many people simply adapt to them. They stretch more often, avoid certain activities, or assume that chronic discomfort is a normal part of aging.
It isn’t.
Persistent inflammatory pain deserves evaluation, especially in younger adults who wouldn’t typically be expected to have chronic back problems.

Ankylosing Spondylitis Affects More Than the Spine

Although the spine is the hallmark of AS, inflammation can affect other parts of the body as well.
Some people experience pain where tendons and ligaments attach to bone, a condition known as enthesitis.
The Achilles tendon, bottoms of the feet, ribs, hips, and shoulders are common areas.
Others develop inflammation in larger joints like the knees or hips.
AS can also be associated with conditions outside the musculoskeletal system, including episodes of eye inflammation called uveitis, inflammatory bowel disease, and psoriasis. These connections highlight an important principle in rheumatology: autoimmune diseases rarely affect just one organ system.
The immune system functions throughout the entire body, so symptoms can appear in places that may not initially seem related.

How Is Ankylosing Spondylitis Diagnosed?

There isn’t a single blood test that confirms ankylosing spondylitis. Diagnosis usually involves putting together multiple pieces of information: your symptoms, physical examination, imaging studies, laboratory testing, and family history. Many patients have a genetic marker called HLA-B27, but not everyone with AS carries this gene, and many people who do carry it never develop the disease. That’s why testing for HLA-B27 is only one part of the diagnostic process—not a diagnosis by itself. Imaging, particularly MRI, can sometimes detect inflammation before permanent structural changes appear on X-rays, allowing earlier recognition of the disease. This is one reason it’s important not to ignore persistent inflammatory back pain. Early evaluation gives us more opportunities to intervene before significant damage occurs.

Movement Is Medicine

One of the most interesting aspects of ankylosing spondylitis is that movement often becomes one of the best treatments.
That doesn’t mean pushing through severe pain or exercising during an active flare without guidance. Rather, regular movement helps maintain spinal flexibility, supports posture, strengthens muscles that protect the joints, and reduces stiffness over time.
Walking, swimming, mobility exercises, yoga, Pilates, and strength training can all play valuable roles when tailored to the individual.
The goal isn’t athletic performance.
The goal is preserving function and helping the body continue moving well for decades.

Lifestyle Still Matters

While medications have transformed the treatment of ankylosing spondylitis and are often an important part of managing the disease, they aren’t the entire picture. In integrative medicine, we also look at the factors that influence overall immune health and resilience.
Fatigue that seems out of proportion to your activity level
An anti-inflammatory eating pattern centered on vegetables, fruits, legumes, whole grains, nuts, seeds, and other whole plant foods provides fiber and phytonutrients that support the gut microbiome and overall health.
For those who include animal foods, seafood can provide high-quality protein and omega-3 fatty acids.
Prioritizing restorative sleep, managing chronic stress, maintaining muscle strength, and avoiding smoking all support long-term health as well.
These lifestyle habits won’t cure ankylosing spondylitis, but they help create an internal environment that supports healing and complements medical treatment.

Listen to What Your Body Is Telling You

One of the biggest mistakes I see is people normalizing symptoms that deserve attention.
If your back pain consistently improves with movement but worsens with rest, if morning stiffness has become part of your daily routine, or if you’ve been living with persistent symptoms for months without answers, it’s worth having a conversation with a healthcare professional—especially a rheumatologist.
Early diagnosis can make a meaningful difference.
The goal isn’t simply to reduce pain today. It’s to preserve mobility, protect your joints, and help you continue living the life you want for years to come.
Back pain may be common, but persistent inflammatory back pain isn’t something you should simply learn to live with.
Sometimes your body is asking for more than rest.
Sometimes it’s asking to be understood.