Severe ankylosing spondylitis: what to know

Ankylosing spondylitis is an inflammatory condition that commonly affects the spine and the joints linking the spine to the pelvis. More advanced disease may bring persistent [Joint Stiffness](/symptoms/joint-stiffness/), reduced spinal movement, pain, fatigue, or a stooped posture. [Morning Joint Stiffness](/symptoms/morning-joint-stiffness/) that improves with movement is a useful detail to report.

Symptoms outside the spine can occur, and reduced movement may affect work, sleep, breathing mechanics, or daily tasks. The level of symptoms and the degree of structural change do not always match, so treatment is based on examination and the person’s function.

A rheumatology team may review inflammation, spinal mobility, hip and shoulder function, and treatment response. Prescribed [Anti-Inflammatory Medication](/treatments/non-surgical-orthopedics/anti-inflammatory-medication/) should be taken only as directed, with discussion of other medicines, stomach problems, kidney disease, pregnancy, or interactions.

Regular, tailored movement helps maintain posture, chest expansion, flexibility, and strength. [Physiotherapy](/treatments/physiotherapy-and-rehabilitation/physiotherapy/) and [Exercise Therapy](/treatments/physiotherapy-and-rehabilitation/exercise-therapy/) can adapt a programme during flares. [Hydrotherapy](/treatments/physiotherapy-and-rehabilitation/hydrotherapy/) may make movement easier when land-based exercise is uncomfortable. Pacing, supportive sleep positioning, and avoiding prolonged immobility can also help preserve function.

Seek urgent care after a fall or impact if new severe spinal pain, weakness, numbness, or difficulty walking appears, because a stiff spine can be vulnerable to injury. Get immediate help for loss of bladder or bowel control, numbness around the inner thighs, or rapidly worsening leg weakness. A painful red eye with light sensitivity, chest pain, breathlessness, or fever also warrants prompt medical attention.

Ask how disease activity is being assessed, whether your [Reduced Range of Motion](/symptoms/reduced-range-of-motion/) needs a targeted programme, and which exercises remain safe during a flare. Discuss medication monitoring, posture support, bone health, and what symptoms should trigger same-day advice.