10 Early Warning Signs of Ankylosing Spondylitis

2. Family History

Your family history can raise your risk for ankylosing spondylitis. If a parent, brother, or sister has this condition, you have a higher chance of developing it as well. This pattern shows that genes play an important role in how your immune system affects your spine and joints.

Ankylosing spondylitis often begins before age 45, and many people notice early signs between ages 15 and 30. When it runs in families, symptoms may appear across generations. You may also face higher risk if close relatives have related inflammatory diseases such as certain bowel disorders or psoriasis, which share immune system changes.

Family history does not mean you will develop the disease. Some people carry risk genes and never have symptoms. Open conversations with relatives about spine problems or inflammatory arthritis can help your healthcare provider assess your risk.

3. Unexplained Heel, Joint, or Chest Pain

You may notice heel pain that seems to come out of nowhere. It often affects the back of your heel or the bottom of your foot. The pain may feel worse when you first stand up in the morning or after long periods of sitting. Ankylosing spondylitis can cause inflammation where tendons and ligaments attach to bone, and the heel is a common site.

Pain can also appear in other joints such as your hips, shoulders, or knees. Unlike typical wear and tear, this joint pain often affects younger adults. Stiffness may improve after you begin moving. Chest pain can develop when the joints between your ribs and breastbone become inflamed, which may cause sharp or aching pain with deep breathing, coughing, or twisting.

Chest pain has many possible causes, including heart or lung disease. Urgent medical care is necessary if the pain feels crushing, spreads to your arm or jaw, or occurs with shortness of breath, sweating, nausea, or dizziness. With ankylosing spondylitis, chest discomfort often relates to movement and breathing and can limit chest expansion over time.

4. Moving Pain

You may notice that your pain shifts from one area to another. It can begin in your lower back and later spread to your hips, buttocks, or upper spine. This pattern can feel confusing, especially when the discomfort does not stay in one clear spot.

The pain often improves when you move. Light activity, stretching, or walking may ease your symptoms, while long periods of rest can make them worse. You may also feel pain outside your spine, including in your shoulders, knees, or ribs. Chest discomfort can occur if the joints between your ribs and breastbone become inflamed.

This moving pain usually develops slowly and may come and go over months or years. Good days and flare-ups are common. Pain that improves with exercise but worsens with sitting or lying down can signal early ankylosing spondylitis and may require medical evaluation.

5. NSAIDs Provide Relief

You may notice that non-steroidal anti-inflammatory drugs, or NSAIDs, ease your early symptoms. These medicines lower inflammation and reduce pain in your spine and joints. Many people with ankylosing spondylitis use them as an early treatment option to manage back pain and stiffness.

Your back may feel better after taking an NSAID and staying active. Morning stiffness that lasts 30 minutes or more may also improve. Pain in your hips, knees, or heels can decrease as well. Common examples include both over-the-counter and prescription forms, which block chemicals in your body that cause swelling and pain.

NSAIDs can cause side effects such as stomach upset, heartburn, bleeding risk, kidney problems, or higher blood pressure. Long-term use requires medical supervision. A clear and steady response to NSAIDs can suggest inflammatory back pain, since mechanical strain often does not improve the same way. This pattern can serve as an early clue of ankylosing spondylitis.

6. Most Commonly Affected

Ankylosing spondylitis often begins when you are young, most commonly between ages 15 and 40. Many people first notice symptoms in their late teens or twenties. Men develop this condition more often than women, but women can also have it. In women, early symptoms may seem milder or less clear.

Your spine is the main area affected. Inflammation usually starts in the sacroiliac joints, which connect your spine to your pelvis. Pain and stiffness often begin there before moving into your lower back. Other joints such as your hips, knees, shoulders, and the ribs where they meet your breastbone can also become inflamed. Rib involvement can cause chest tightness and discomfort with deep breathing.

Areas where tendons attach to bones can also hurt. Pain may appear behind your heel, under your foot, or near your shin, which can make walking harder. Some people develop problems outside the joints, including red and painful eyes, psoriasis, or inflammatory bowel disease.

7. Eye Inflammation

Eye inflammation can be an early sign of ankylosing spondylitis. You may notice sudden redness in one eye along with pain or strong sensitivity to light. The problem often begins quickly. Your eye may water more than usual, and your vision may become blurry. Some people feel a deep ache inside the eye.

This condition is called uveitis or iritis. It occurs when the middle layer of your eye becomes inflamed. It differs from the common pink eye, which usually causes mild irritation and discharge. Warning signs include redness in one eye, pain that worsens in bright light, blurred vision, and headache with eye discomfort.

Eye inflammation related to ankylosing spondylitis can return over time. Flares may last days to weeks. Prescription anti-inflammatory eye drops, often corticosteroids, are common treatments. Pupil-dilating drops may reduce pain and prevent complications. Prompt medical evaluation is essential, since delayed care can increase the risk of permanent vision damage.

8. Bowel Inflammation

Ankylosing spondylitis can affect more than your spine. It can also cause inflammation in your digestive tract. You may notice ongoing stomach pain, cramping, or clear changes in your bowel habits. These symptoms can feel separate from your back pain at first.

Some people develop inflammatory bowel disease, which causes long-term swelling in the intestines. You may have frequent diarrhea, blood in your stool, or a strong and urgent need to use the bathroom. These problems can come and go, or they can last for weeks at a time.

Bowel symptoms may appear before or after back pain begins. In some cases, they disrupt daily life and limit normal activities. Inflammation in the intestines is often treated with anti-inflammatory medicines or drugs that calm the immune system. Ongoing digestive problems along with back stiffness may reflect linked inflammatory changes in both the joints and digestive tract.

9. Morning Stiffness That Improves With Activity

Morning stiffness is a common early sign of ankylosing spondylitis. You may wake up with a tight and sore lower back that makes it hard to sit up or stand straight. This stiffness often lasts longer than 30 minutes and can continue for an hour or more after you get out of bed.

Rest usually does not improve this type of stiffness. Long periods of lying still can make it worse, and pain may wake you during the second half of the night. Movement often brings relief. Stretching, walking, or taking a warm shower may help your back feel looser and reduce pain.

This pattern helps doctors tell the difference between inflammatory back pain and simple muscle strain. Muscle strain often improves with rest, while ankylosing spondylitis tends to improve with activity.

10. Fatigue

Fatigue is a common early sign of ankylosing spondylitis. You may feel very tired even after a full night’s sleep. This type of fatigue is stronger than normal tiredness. It can affect your mood, focus, and daily routine. The tiredness may build gradually and persist even after rest or reduced activity.

Inflammation in your body uses energy and keeps your immune system active. This constant activity can leave you feeling worn out. Ongoing back pain and stiffness can also interrupt your sleep. Night pain or early morning stiffness often reduces sleep quality and lowers your energy during the day.

Inflammatory chemicals released in the body may also contribute directly to feelings of exhaustion. Simple tasks such as climbing stairs, working, or focusing in school may feel harder than usual. Some days may seem better, but the deep tired feeling often returns.