Ankylosing spondylitis (AS) is a type of autoimmune arthritis that typically affects your spine and hip or lower back joints. This condition causes inflammation leading to pain, swelling, stiffness, and other symptoms.
Like other kinds of arthritis, ankylosing spondylitis can sometimes flare. A flare-up happens when symptoms worsen. During a flare-up, you might need more care and treatment than you need at other times. Remission or partial remission is when you have fewer, milder, or no symptoms.
Knowing when you might have a flare-up and what to expect can help you manage your health. Talk to your doctor about the best way to help prevent and soothe symptoms. There are several ways to ease symptoms and treat ankylosing spondylitis.
Flare-ups and their symptoms can be very different for every person with ankylosing spondylitis.
Most people with this condition notice symptoms from the ages of 17 to 45 years. Symptoms can also begin during childhood or in older adults. Ankylosing spondylitis is 2.5 times more common in men than women.
There are two main kinds of ankylosing spondylitis flare-ups:
- local: in one or two areas only
- general: throughout the body
Signs and symptoms of ankylosing spondylitis flare-ups may change depending on how long you’ve had the condition.
Pain in the lower back, hips, and buttocks
Pain may begin gradually over a few weeks to months. You may feel discomfort on only one side or alternating sides. The pain normally feels dull and spreads over the area.
It’s usually not a sharp pain. The pain is normally worse in the mornings and at night. Resting or being inactive may worsen the pain.
You may have stiffness in the lower back, hips, and buttocks area. Your back may feel stiff, and it might be slightly difficult to stand up after sitting or lying down. Stiffness is typically worse in the morning and at night and improves during the day. It may get worse during rest or inactivity.
Neck pain and stiffness
The Spondylitis Association of America notes that women may be more likely to have symptoms that start in the neck and not the lower back.
Inflammation and pain can lead to fatigue and tiredness. This may be worsened by disturbed sleep at night due to pain and discomfort. Controlling inflammation helps to manage fatigue.
Inflammation, pain, and discomfort can cause loss of appetite, weight loss, and a mild fever during flare-ups. Managing pain and inflammation helps to ease these symptoms.
Long-term ankylosing spondylitis flare-ups typically cause signs and symptoms in more than one part of the body.
Chronic back pain
An ankylosing spondylitis flare-up may cause chronic back pain over time. You may feel dull to burning pain on both sides of the lower back, buttocks, and hips. Chronic pain can last for 3 months or longer.
Pain in other areas
Pain can spread to other joints over the course of a few months to years. You may have pain and tenderness in the mid to upper back, the neck, shoulder blades, ribs, thighs, and heels.
You may also have more stiffness in your body over time. Stiffness may also spread to the upper back, neck, shoulders, and rib cage. Stiffness may be worse in the mornings and get only slightly better during the day. You may also have muscle spasms or twitching.
Loss of flexibility
You may lose normal flexibility in some joints. Long-term inflammation in and around the joints can fuse or join bones together. This makes the joints stiffer, painful, and harder to move. You may have less flexibility in your back and hips.
Bones in your rib cage can also fuse or join together. The rib cage is designed to be flexible to help you breathe. If the rib joints become stiffer, it may be harder for your chest and lungs to expand. This may make your chest feel tight.
Ankylosing spondylitis can affect even more joints over time. You may have pain and swelling in the hips, knees, ankles, heels, and toes. This can make it difficult to stand, sit, and walk.
Ankylosing spondylitis flare-ups may also spread to the fingers over time. This can make the finger joints stiff, swollen, and painful. You may have difficulty moving your fingers, typing, and holding or opening things.
Lung and heart inflammation
Rarely, ankylosing spondylitis flare-ups may affect the heart and lungs over time in some people.
There are no known causes for ankylosing spondylitis. Flare-ups also can’t always be controlled. Some people with ankylosing spondylitis may feel that their flare-ups have certain triggers. Knowing your triggers — if you have any — may help prevent flare-ups.
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The duration and frequency of flare-ups vary among people with ankylosing spondylitis.
Flare-ups may last from a few days to 3 months or longer.
Treatment will depend on what type of symptoms you experience and how severe they are. Here are some possible treatments to help during flare-ups:
- light exercise and stretching
- warm shower or bath
- heat therapy, such as a warm compress
- nonsteroidal anti-inflammatory drugs (NSAIDs), such as aspirin, ibuprofen, or naproxen
- physical therapy
- prescription medications
- massage therapy
- steroid injections
- hand or wrist brace
- knee or foot brace
- steroid eye drops
- eye drops to dilate the pupils
Healthy lifestyle choices may also help manage flares. For example, regular exercise and physical therapy may help reduce pain and stiffness.
You’ll want to try to quit smoking and avoid secondhand smoke. People with ankylosing spondylitis who smoke are at higher risk of spine damage. This condition also affects your heart. You may have a higher risk of heart disease and stroke if you’re a smoker.
Take all medications exactly as prescribed to help prevent and soothe flare-ups. Your doctor may prescribe one or more medications that help to control inflammation. This may help prevent or ease flare-ups. Drugs used to treat ankylosing spondylitis include:
- adalimumab (Humira)
- certolizumab (Cimzia)
- etanercept (Enbrel)
- golimumab (Simponi)
- infliximab (Remicade)
- chemotherapy drugs
- IL-17 inhibitors, such as secukinumab (Cosentyx) or ixekizumab (Taltz)
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Getting involved with a support group can help you feel in control of your treatment. Join an ankylosing spondylitis organization to keep up to date with new health research. Talk to other people with this condition to find the best way to manage ankylosing spondylitis for you.
Your experience with ankylosing spondylitis flare-ups will not be the same as someone else with this condition. Pay attention to your body. Keep a daily symptom and treatment journal. Also, record possible triggers you might notice.
Tell your doctor if you think a treatment is helping to prevent flares or reduce symptoms or if you feel that treatment isn’t helping you. What worked for you before may no longer work for you over time. Your doctor may have to change your treatments as your ankylosing spondylitis changes.