Back arthritis is a breakdown or inflammation of the joints in your spine, most commonly the facet joints that connect each vertebra to the ones above and below it. It’s one of the most common causes of chronic back pain, and it becomes dramatically more prevalent with age: about 3.6% of adults between 18 and 34 have some form of arthritis, compared to nearly 54% of adults 75 and older, according to CDC data from 2022. Several distinct types of arthritis can affect the spine, each with different causes and patterns.
Types of Back Arthritis
The most common form is spinal osteoarthritis, sometimes called spondylosis. This is the wear-and-tear type. The cartilage lining the facet joints gradually breaks down over time, and the surrounding bone, ligaments, and muscles are affected as well. Modern understanding treats it as a failure of the whole joint structure, not just the cartilage surface. Bone spurs often develop as the body tries to stabilize the area, and these can narrow the spaces where nerves exit the spine.
Inflammatory types of back arthritis work differently. Ankylosing spondylitis is the most common inflammatory form, two to three times more frequent in men than women, and it typically begins with back pain and stiffness at a young age rather than in middle age. A genetic marker called HLA-B27 contributes roughly 30% of the inherited risk for ankylosing spondylitis, and about 90% of people with the condition carry this marker. Over time, ankylosing spondylitis can cause vertebrae to fuse together, severely limiting spinal mobility.
Other inflammatory types include psoriatic arthritis (linked to the skin condition psoriasis) and arthritis associated with inflammatory bowel disease. Rheumatoid arthritis, an autoimmune condition, can also affect the spine, particularly the upper neck where the first two vertebrae meet.
What Back Arthritis Feels Like
The hallmark symptom is stiffness and pain that tends to be worst in the morning or after sitting still for a long time. In a study of older adults with back complaints, about 75% reported morning stiffness, with roughly a quarter experiencing stiffness lasting more than 30 minutes. Pain can occur anywhere from the top of the shoulder blades down to the base of the spine.
The character of the stiffness helps distinguish the type. Osteoarthritis stiffness generally loosens within 15 to 30 minutes of moving around and tends to flare after physical activity. Inflammatory arthritis like ankylosing spondylitis causes stiffness that lasts longer, often well over 30 minutes, and actually improves with movement rather than rest. People with inflammatory back arthritis often notice their worst pain in the second half of the night or first thing in the morning.
Other common symptoms include a grinding or crunching sensation when moving the spine, reduced range of motion, and pain that radiates into the buttocks or thighs when nerve roots are compressed. Some people develop numbness or tingling in the legs if bone spurs or swollen tissue press on spinal nerves.
How It’s Diagnosed
Diagnosis typically starts with a physical exam and X-rays. On imaging, osteoarthritis shows up as narrowed joint spaces, bone spurs, and roughened joint surfaces. Ankylosing spondylitis has distinctive early signs: erosion at the corners of vertebrae (called Romanus lesions), vertebral squaring, and bright spots at the vertebral corners on X-ray known as “shiny corners.”
MRI provides a more detailed picture and can detect active inflammation that X-rays miss. It’s particularly useful for identifying soft tissue swelling in rheumatoid arthritis and early inflammatory changes in ankylosing spondylitis before permanent bone damage appears. For psoriatic arthritis, imaging often reveals characteristic thick bony growths along the sides of the vertebrae.
Blood tests help when inflammatory arthritis is suspected. Testing for the HLA-B27 genetic marker increases diagnostic confidence in people who already have symptoms suggestive of ankylosing spondylitis, though having the marker alone doesn’t mean you’ll develop the condition.
Treatment and Pain Management
First-line treatment for back arthritis combines anti-inflammatory medication with exercise. Clinical guidelines worldwide recommend over-the-counter anti-inflammatory drugs or acetaminophen as a starting point for pain control. These help manage flares but don’t slow joint damage in osteoarthritis.
Exercise is equally important and, in some cases, more effective long-term than medication alone. A structured home program typically focuses on two components: strengthening the trunk muscles (both the abdominals and back extensors through exercises like sit-ups and back extensions) and stretching the hip flexors, glutes, hamstrings, and abdominal and back muscles. A common prescription is 10 repetitions of each exercise, at least twice a day, with the overall goal of improving spinal mobility and building the muscular support around arthritic joints.
For inflammatory types like ankylosing spondylitis, treatment often involves targeted medications that suppress the specific immune pathways driving the inflammation. These can slow or prevent joint fusion when started early enough. Physical therapy focused on posture and spinal extension is especially critical for ankylosing spondylitis to maintain an upright position as the disease progresses.
When Surgery Becomes an Option
Surgery is reserved for cases where conservative treatment fails or nerve compression causes significant weakness or loss of function. The two most common procedures are laminectomy, which removes bone or tissue pressing on nerves, and spinal fusion, which permanently joins two or more vertebrae to eliminate painful motion at a damaged joint.
Spinal fusion has high technical success rates, with both minimally invasive and traditional open approaches achieving fusion in more than 90% of cases in long-term follow-up. The minimally invasive version involves smaller incisions and less muscle disruption, leading to shorter hospital stays, less post-operative pain, reduced need for pain medication, and a faster return to work. Open fusion, by contrast, involves more extensive muscle dissection and typically requires longer hospitalization and rehabilitation. Your surgeon’s recommendation depends on the location and severity of the arthritis, the number of spinal levels involved, and your overall health.
Diet and Lifestyle Factors
An anti-inflammatory eating pattern won’t reverse arthritis, but it can help reduce the chronic low-grade inflammation that worsens joint pain. The most evidence-backed foods include fatty fish like salmon, mackerel, and sardines (rich in omega-3 fatty acids), leafy greens such as spinach and kale, berries, cherries, nuts like almonds and walnuts, olive oil, and tomatoes. These foods contain natural antioxidants and protective plant compounds that have demonstrated anti-inflammatory effects in experimental studies. Coffee also appears to offer some anti-inflammatory benefit through its polyphenol content.
Maintaining a healthy weight is one of the single most impactful things you can do. Every extra pound adds compressive force to the facet joints. Staying physically active, even on days when stiffness is present, helps preserve joint mobility and strengthens the muscles that support the spine. Low-impact activities like swimming, walking, and cycling are generally well tolerated.
Warning Signs That Need Urgent Attention
In rare cases, severe spinal arthritis can lead to a condition called cauda equina syndrome, where a large bone spur, disc fragment, or narrowed spinal canal compresses the bundle of nerves at the base of the spine. This is a surgical emergency. The warning signs include sudden loss of bladder or bowel control, numbness in the groin or inner thighs (the “saddle” area), rapidly worsening weakness in one or both legs, and new sexual dysfunction. If you experience any combination of these symptoms alongside back pain, you need emergency imaging, typically an MRI, to determine whether the nerves are being compressed. Delayed treatment can result in permanent loss of bladder and bowel function.