The most common types of arthritis affect joints in different ways

Arthritis is not one disease — it is a group of conditions that damage joints, and the type you have changes how it progresses and what treatment works. The seven most common types are osteoarthritis, rheumatoid arthritis, psoriatic arthritis, gout, lupus, ankylosing spondylitis, and juvenile idiopathic arthritis. Each one has a different cause: some come from wear and tear, some from your immune system attacking your joints, and some from crystals building up in the joint space. Knowing which type you have matters because the medications, physical therapy, and lifestyle changes that help one type may not help another.

Your doctor will use blood tests, imaging, and your medical history to figure out which type you have. This matters because some types cause permanent joint damage within months or years if not treated early, while others progress slowly over decades. Understanding your type helps you know what to expect and what treatment options are available to you.

Key Takeaways

  • Osteoarthritis is the most common type and develops when the cartilage that cushions joints wears down over time, usually after age 50.
  • Rheumatoid arthritis is an autoimmune disease where your immune system attacks the lining of your joints, often affecting both sides of your body equally.
  • Gout causes sudden, severe pain when uric acid crystals form in a joint, most often the big toe, and can be managed by lowering uric acid levels.
  • Psoriatic arthritis, lupus, and ankylosing spondylitis are less common but serious conditions that require early diagnosis to prevent joint damage.
  • Juvenile idiopathic arthritis occurs in children under 16 and can affect growth and development if not treated early.

Osteoarthritis: wear-and-tear damage to joints

Osteoarthritis is the most common type of arthritis. It develops when the cartilage that covers the ends of bones wears down over time, usually after age 50, though it can start earlier if you have had a joint injury. The cartilage cannot repair itself once it is damaged, so the bones begin to rub together, causing pain, stiffness, and swelling. Osteoarthritis most often affects the knees, hips, hands, and spine.

Risk factors include age, being overweight, previous joint injuries, and repetitive stress on a joint from work or sports. Unlike some other types of arthritis, osteoarthritis is not caused by your immune system. There is no cure, but pain can be managed with over-the-counter pain relievers, physical therapy, weight loss if needed, and in some cases injections or surgery. Symptoms usually develop slowly over months or years.

Rheumatoid arthritis: an autoimmune attack on joints

Rheumatoid arthritis (RA) is an autoimmune disease in which your immune system mistakenly attacks the lining of your joints. This causes inflammation, pain, swelling, and over time, permanent damage to the joint itself. RA often affects the same joints on both sides of your body — both hands, both knees, both feet — which is different from osteoarthritis. It can also cause fatigue, fever, and loss of appetite.

RA usually starts between ages 30 and 60, though it can occur at any age, and it is more common in women than men. Early treatment is critical because the joint damage can happen within the first few years if the disease is not controlled. Medications called disease-modifying antirheumatic drugs (DMARDs) and biologic drugs can slow or stop the progression. Blood tests that show rheumatoid factor or anti-CCP antibodies help confirm the diagnosis.

Psoriatic arthritis: arthritis linked to psoriasis

Psoriatic arthritis occurs in some people who have psoriasis, a skin condition that causes red, scaly patches. About one in three people with psoriasis develop arthritis, usually within 10 years of the skin symptoms appearing, though arthritis can come first. The joint pain and swelling can affect any joint, but commonly the fingers, toes, knees, and spine.

Psoriatic arthritis is also an autoimmune condition and requires early treatment to prevent permanent joint damage. Some people have mild symptoms in only one or two joints, while others have widespread joint pain. Medications used to treat rheumatoid arthritis, including DMARDs and biologic drugs, are often used for psoriatic arthritis as well. If you have psoriasis and develop joint pain, tell your doctor so they can monitor for arthritis.

Gout: sudden pain from uric acid crystals

Gout is caused by uric acid crystals that form inside a joint, triggering sudden, severe pain, redness, and swelling. Attacks often strike without warning and most commonly affect the big toe, though gout can occur in the ankle, knee, wrist, or other joints. An attack can last days to weeks, and some people have only one attack in their lifetime while others have many.

Gout develops when uric acid levels in the blood become too high. This can happen because your body produces too much uric acid, your kidneys do not remove it efficiently, or you consume too much purine (found in red meat, organ meats, and certain seafood). Medications can lower uric acid levels and prevent future attacks. During an acute attack, anti-inflammatory medications and rest help manage pain. Lifestyle changes such as limiting alcohol, staying hydrated, and avoiding purine-rich foods can reduce the risk of future attacks.

Lupus: an autoimmune disease affecting multiple body systems

Lupus (systemic lupus erythematosus, or SLE) is an autoimmune disease in which your immune system attacks many parts of your body, including joints, skin, kidneys, heart, and lungs. Joint pain and swelling are common symptoms, often in the hands, wrists, and knees. Lupus also causes fatigue, fever, a butterfly-shaped rash across the cheeks and nose, and sensitivity to sunlight.

Lupus is much more common in women, particularly Black and Hispanic women, and usually appears between ages 15 and 45. It is a serious condition that requires ongoing medical care because it can damage vital organs. Blood tests including antinuclear antibody (ANA) and anti-dsDNA antibodies help confirm diagnosis. Treatment depends on which parts of the body are affected but often includes antimalarial drugs, corticosteroids, and immunosuppressive medications.

Ankylosing spondylitis: progressive stiffness of the spine

Ankylosing spondylitis (AS) is an autoimmune disease that primarily affects the spine, causing inflammation, pain, and over time, stiffness and reduced mobility. It can also affect the hips, shoulders, ribs, and other joints. Early symptoms include lower back pain and stiffness, especially in the morning or after periods of inactivity. As the disease progresses, the spine can become fused, limiting movement.

AS is more common in men and often begins in the late teens or early adulthood. A genetic marker called HLA-B27 is present in most people with AS, though not everyone with this marker develops the disease. Early diagnosis and treatment with anti-inflammatory medications and biologic drugs can slow progression and help maintain mobility. Physical therapy and exercise are important to keep the spine as flexible as possible.

Juvenile idiopathic arthritis: arthritis in children

Juvenile idiopathic arthritis (JIA) is arthritis that begins before age 16 and has no known cause. It is the most common type of arthritis in children. JIA can affect one joint or many joints and may cause pain, swelling, stiffness, and reduced movement. Some children also develop eye inflammation, which can lead to vision problems if not treated.

There are several subtypes of JIA, including oligoarticular (affecting a few joints), polyarticular (affecting many joints), and systemic (affecting the whole body with fever and rash). Early treatment is critical to prevent permanent joint damage and to allow normal growth and development. Medications include NSAIDs, corticosteroids, DMARDs, and biologic drugs. Children with JIA should see a pediatric rheumatologist and may need regular eye exams to check for inflammation.

Frequently Asked Questions

Can you have more than one type of arthritis at the same time?

Yes. Some people develop osteoarthritis in one joint and gout in another, or have both rheumatoid arthritis and osteoarthritis. If you have symptoms in different joints or your symptoms do not fit one clear pattern, mention this to your doctor so they can test for multiple conditions.

How do doctors tell which type of arthritis I have?

Doctors use a combination of your medical history, a physical exam, blood tests (which look for antibodies and inflammatory markers), and imaging such as X-rays or ultrasound. Some types like rheumatoid arthritis and lupus have specific blood test markers, while osteoarthritis is often diagnosed by imaging and symptoms alone.

Is arthritis always painful?

Not always. Some people have arthritis with minimal pain, especially in early stages. Others have significant pain that comes and goes. Pain level depends on the type of arthritis, how advanced it is, and how well it is being treated. Even without pain, some types of arthritis can cause joint damage if left untreated.

Can arthritis go away on its own?

Osteoarthritis and most autoimmune types of arthritis do not go away without treatment. Gout attacks can resolve on their own, but the underlying uric acid problem remains. Early treatment of autoimmune arthritis can prevent or slow permanent joint damage, so it is important to see a doctor if you have persistent joint pain.

What should I ask my doctor if I think I have arthritis?

Ask which type of arthritis they suspect, what tests they recommend, what treatment options are available, whether early treatment can prevent joint damage, and whether you should see a rheumatologist. Also ask about physical therapy, exercise, and lifestyle changes that may help manage your symptoms.