A young man with morning back stiffness lasting hours, improving with exercise and worse with rest — this is AS, not a disc problem. Dr. Anand Karnam explains why AS is missed for years and what early treatment prevents.
Key Points
- Ankylosing spondylitis (AS) is an inflammatory arthritis affecting the spine — classically affecting young men under 30.
- Key feature: back pain WORSE in the morning and with rest, BETTER with exercise — the opposite of mechanical back pain.
- HLA-B27 gene positive in 90% of AS patients — a useful screening test in young men with inflammatory back pain.
- Early treatment with NSAIDs and biologic agents (anti-TNF) significantly prevents spinal fusion.
- Physiotherapy is as important as medication — daily spine extension exercises prevent progressive stiffening.
90%
of ankylosing spondylitis patients are HLA-B27 positive
Source: NCBI
3×
more common in men than women — peak onset age 20–30 years
Source: NHS
5 years
average delay between symptom onset and AS diagnosis in India
Source: ICMR
"Any young man under 30 who tells me his back pain is worse in the morning and improves after a walk — I think AS. The 'morning stiffness lasting more than 1 hour' is the cardinal symptom. Getting this diagnosis early with HLA-B27 and MRI SI joints can prevent the spinal deformity that comes with late-treated disease."
Ankylosing spondylitis (AS) — now classified under the broader term axial spondyloarthritis (axSpA) — is a chronic inflammatory arthritis primarily affecting the spine and sacroiliac joints. It is characterised by inflammatory back pain, progressive spinal stiffness, and ultimately, in severe uncontrolled cases, fusion of the spinal vertebrae. AS predominantly affects young men (onset typically 20–40 years), is significantly underdiagnosed in India, and causes an average diagnostic delay of 8–10 years from symptom onset.
How to Distinguish Inflammatory Back Pain from Mechanical Back Pain
Most back pain is mechanical — caused by muscle strain, disc disease, or postural problems. Inflammatory back pain from AS has a completely different character:
| Feature | AS / Inflammatory | Mechanical |
|---|---|---|
| Age of onset | Under 40 | Any age |
| Morning stiffness | Over 45 minutes | Under 30 minutes |
| Effect of rest | Worsens (stiffness) | Improves |
| Effect of exercise | Improves | Worsens |
| Night pain | Often wakes from sleep | Rarely |
| Alternating buttock pain | Characteristic | Rare |
Extra-Articular Features of AS
AS is a systemic condition — it can cause: uveitis (recurrent painful red eye — the eye specialist seeing recurrent uveitis should screen for AS); psoriasis; inflammatory bowel disease (Crohn's, ulcerative colitis); heel pain (enthesitis at the Achilles insertion); peripheral arthritis.
Diagnosis
MRI sacroiliac joints (the most sensitive early test — detects bone marrow oedema before X-ray changes appear); X-ray pelvis (sacroiliitis in established disease); HLA-B27 (positive in 90% of AS, but also positive in 8% of the general population — not diagnostic alone); inflammatory markers (CRP, ESR — elevated in active disease but normal in 50% of AS). The diagnosis is clinical — based on inflammatory back pain pattern, MRI findings, and response to NSAIDs.
Treatment
NSAIDs (anti-inflammatory medicines): First-line — significant anti-inflammatory effect and potential to slow radiographic progression with continuous use. Physiotherapy: absolutely essential — daily spinal extension exercises maintain spinal mobility. TNF-alpha inhibitors (adalimumab, etanercept): highly effective in NSAID-refractory AS, dramatically reduce inflammation and prevent fusion. IL-17 inhibitors: effective alternative biological therapy.
For AS diagnosis and management: Sri Anand CNC, Chanda Nagar, Hyderabad. Call +91 90633 66983.
Dr. Anand Karnam
DrNB Neurology · Sri Anand CNC, Chanda Nagar Hyderabad · Sri Anand Child and Neuro Center
DrNB-qualified Neurologist, Fellow of the World Headache Society (FWHS), and Headache Specialist with 12+ years of experience treating epilepsy, stroke, migraine, and movement disorders. Practices at Sri Anand Child and Neuro Center, Chanda Nagar, Hyderabad.
References & Sources
- 1.Ankylosing Spondylitis — NCBI StatPearls — NCBI StatPearls
- 2.Ankylosing Spondylitis — NHS — NHS UK
- 3.Ankylosing Spondylitis — NIH MedlinePlus — NIH MedlinePlus
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