Arthritis

What is arthritis?

Arthritis is a general term for inflammation (swelling, warmth, and irritation) of one or more joints. A joint is the place where two bones meet, such as the knee, hip, wrist, or the small joints of the fingers. Arthritis is not a single disease. It is a group of more than one hundred related conditions that share the common feature of joint pain, stiffness, and reduced movement. When people ask what is arthritis, the most useful answer is that it describes damage or inflammation inside a joint, and the exact cause and treatment depend on which type is present.

The two most common forms are osteoarthritis and rheumatoid arthritis. Osteoarthritis is a wear-related condition in which cartilage (the smooth, cushioning tissue that covers the ends of bones) gradually thins and breaks down. Rheumatoid arthritis is an autoimmune disease, meaning the immune system mistakenly attacks the lining of the joints. Other types include psoriatic arthritis (linked to the skin condition psoriasis), gout (caused by uric acid crystals forming in a joint), ankylosing spondylitis (which mainly affects the spine), reactive arthritis after certain infections, and juvenile arthritis in children.

Arthritis affects people of all ages, sexes, and backgrounds, although it becomes more common with age. Osteoarthritis is most often seen in adults over 50, while rheumatoid arthritis frequently begins between the ages of 30 and 60 and affects women more often than men. Because arthritis is so common, it is one of the leading causes of long-term pain and disability worldwide.

Symptoms of arthritis

Arthritis symptoms vary depending on the type, the joints involved, and how advanced the condition is. Some people notice mild, occasional discomfort, while others experience daily pain that limits everyday tasks. Common arthritis symptoms include:

• Joint pain that may be dull, aching, or sharp, and that often worsens with use or at the end of the day
• Stiffness, especially after resting or first thing in the morning
• Swelling of the joint, sometimes with warmth or redness of the overlying skin
• Reduced range of motion, meaning the joint cannot bend or straighten as far as before
• Grinding, clicking, or cracking sensations when the joint moves
• Weakness in the muscles around the affected joint
• Joint deformity in more advanced disease, such as knobby finger joints or joints that drift out of alignment
• Tiredness, low-grade fever, or a general feeling of being unwell, which are more typical of inflammatory types such as rheumatoid arthritis

The pattern of symptoms often gives clues about the type. In osteoarthritis, stiffness in the morning usually eases within about half an hour, pain tends to build with activity, and the joints most often affected are the knees, hips, lower back, neck, and the base of the thumb and fingertips. In rheumatoid arthritis, morning stiffness commonly lasts longer than an hour, the same joints on both sides of the body are often involved, and the small joints of the hands, wrists, and feet are frequently affected first. Gout typically causes sudden, severe pain, redness, and swelling in a single joint, very often the big toe, and attacks may come and go. Psoriatic arthritis may cause swelling of an entire finger or toe and changes in the nails.

In early stages, symptoms may be intermittent and mild. Over time, untreated inflammatory arthritis can lead to permanent joint damage, while advanced osteoarthritis can cause constant pain and difficulty walking, climbing stairs, gripping objects, or sleeping comfortably.

Causes and risk factors

Arthritis causes differ by type, and in many cases several factors act together. Doctors generally group them as follows:

• Cartilage wear and tear: in osteoarthritis, years of mechanical stress, previous injury, or abnormal joint shape gradually damage cartilage, and the underlying bone may thicken or form bony spurs.
• Autoimmune inflammation: in rheumatoid arthritis, psoriatic arthritis, and ankylosing spondylitis, the immune system attacks the synovium (the thin membrane lining the joint), causing ongoing inflammation that can erode cartilage and bone.
• Crystal deposits: in gout, high levels of uric acid in the blood form needle-like crystals inside a joint; a related condition called pseudogout involves calcium crystals.
• Infection: bacteria, viruses, or fungi can directly infect a joint (septic arthritis) or trigger inflammation elsewhere in the body (reactive arthritis).
• Other diseases: conditions such as lupus, inflammatory bowel disease, or certain metabolic disorders can involve the joints.

Certain factors raise the likelihood of developing arthritis or make it more severe:

• Age: the risk of most types, especially osteoarthritis, rises with age.
• Family history: some types, including rheumatoid arthritis and ankylosing spondylitis, run in families and are linked to inherited genes.
• Sex: women are more likely to develop rheumatoid arthritis and osteoarthritis, while men are more likely to develop gout.
• Excess body weight: extra weight increases the load on weight-bearing joints such as the knees and hips and also promotes inflammation.
• Previous joint injury: fractures, ligament tears, or repeated minor injuries can lead to osteoarthritis in that joint years later.
• Repetitive joint stress: occupations or sports that involve kneeling, heavy lifting, or repeated movements can contribute.
• Smoking: smoking is associated with a higher risk of rheumatoid arthritis and may make it harder to control.
• Diet and other health conditions: a diet rich in red meat, alcohol, or sugary drinks may raise uric acid and gout risk; diabetes and high blood pressure are also linked to certain forms.

Arthritis diagnosis

There is no single test that confirms every type of arthritis. Arthritis diagnosis is usually built from a detailed medical history, a physical examination, and selected tests chosen to identify the type and rule out other conditions. Your doctor will typically ask when the pain started, which joints are involved, whether symptoms are worse in the morning or after activity, and whether you have other symptoms such as rashes, eye problems, or fatigue.

During the physical examination, the doctor checks each affected joint for swelling, warmth, tenderness, range of motion, and signs of fluid inside the joint. They may also look at the skin, nails, eyes, and spine, because some types of arthritis affect these areas as well.

Tests that may be used include:

• Blood tests: markers of inflammation such as erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP); rheumatoid factor and anti-CCP antibodies, which are often present in rheumatoid arthritis; uric acid levels for suspected gout; and the HLA-B27 gene test, which is associated with ankylosing spondylitis. Normal blood tests do not rule out arthritis, especially osteoarthritis.
• X-rays: these show narrowing of the joint space, bony spurs, erosions, and changes in alignment. Early disease may not be visible on X-ray.
• Ultrasound: a painless scan that can detect inflammation of the joint lining, fluid, and early erosions that X-rays may miss.
• Magnetic resonance imaging (MRI): gives detailed pictures of cartilage, bone, and soft tissue, and is used when the diagnosis is unclear or the spine is involved.
• Joint aspiration: a small needle is used to draw fluid from a swollen joint; the fluid is then examined for crystals, infection, or inflammatory cells. This is particularly helpful for diagnosing gout and septic arthritis.

For inflammatory types, doctors often apply internationally agreed classification criteria that combine the number and type of joints involved, blood test results, and how long symptoms have lasted. Arthritis is commonly diagnosed and managed by rheumatologists (doctors specializing in joint and autoimmune disease), orthopedic surgeons, and physical medicine and rehabilitation specialists. At Acibadem, care for arthritis is coordinated across these departments depending on the type and stage of the condition.

Treatment options for arthritis

Arthritis treatment options aim to relieve pain, reduce inflammation, protect the joint from further damage, and keep you moving. Most people benefit from a combination of approaches rather than a single treatment, and the plan usually changes over time. There is currently no cure for most forms of arthritis, but many types can be well controlled.

Self-care and observation. For mild osteoarthritis, your doctor may recommend monitoring symptoms while making practical changes: staying physically active, maintaining a healthy weight, using heat or cold packs, and pacing activities to avoid flare-ups. Supportive footwear, walking aids, splints, or braces can reduce strain on painful joints.

Medication. Options depend on the type of arthritis:

• Pain relievers such as acetaminophen for mild to moderate pain.
• Nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen or naproxen, taken by mouth or applied as a gel, to reduce pain and inflammation. Long-term use carries stomach, kidney, and heart risks, so your doctor will weigh benefits and risks.
• Corticosteroids (strong anti-inflammatory medicines) as tablets or as an injection directly into a joint to calm a flare.
• Disease-modifying antirheumatic drugs (DMARDs) such as methotrexate, which slow or stop the immune attack in rheumatoid and psoriatic arthritis. These are usually started early to prevent permanent damage.
• Biologic and targeted therapies, which are newer medicines that block specific parts of the immune system when conventional DMARDs are not enough.
• Urate-lowering medicines such as allopurinol for gout, along with medicines to treat acute attacks.
• Antibiotics given urgently for septic arthritis.

Physical therapy and rehabilitation. Exercise is one of the most important parts of arthritis treatment. A physical therapist can design a program to strengthen the muscles that support the joint, improve flexibility, and reduce pain. Occupational therapists teach ways to protect joints during daily tasks and may recommend assistive devices. Rehabilitation is commonly delivered through a physical medicine and rehabilitation department, which may also offer treatments such as hydrotherapy (exercise in warm water) and pain-management programs.

Procedures. Joint injections of corticosteroids or hyaluronic acid (a lubricating substance) may provide temporary relief in some people. Joint aspiration can relieve pressure from excess fluid. Evidence for some injectable treatments is mixed, so your doctor may explain the expected benefits and limitations before recommending them.

Surgery. Surgery is generally considered when pain and disability remain severe despite other treatments. Options include arthroscopy (keyhole surgery to remove loose fragments or repair tissue in selected cases), osteotomy (realigning bone to shift weight away from the damaged part of the joint), joint fusion (permanently joining bones to stop painful movement, often in the wrist, ankle, or spine), and joint replacement, in which the damaged joint surfaces are replaced with artificial parts. Hip and knee replacements are the most common and often provide lasting pain relief, although recovery takes time and, like all surgery, carries risks.

Living with arthritis and outlook

The outlook for arthritis depends largely on the type, how early it is identified, and how consistently it is managed. Osteoarthritis tends to progress slowly over years; some people remain stable for long periods, while others eventually need joint replacement. Rheumatoid and other inflammatory types were once almost certain to cause deformity, but with early diagnosis and modern medication, many people now achieve low disease activity or remission (a period with few or no symptoms), although relapses can occur and treatment is usually long-term. Gout can often be controlled well when uric acid levels are kept low with medication and lifestyle changes.

Day-to-day, people with arthritis often find it helpful to stay active with low-impact exercise such as walking, swimming, or cycling; to balance activity with rest; to keep a healthy weight; to stop smoking; and to protect joints by using good posture and avoiding prolonged positions. Learning to recognize early signs of a flare and having a plan agreed with your doctor can reduce its impact. Chronic pain can affect mood and sleep, so support for mental health is a legitimate part of arthritis care.

Regular follow-up matters. Some arthritis medicines require routine blood tests to monitor for side effects, and inflammatory arthritis is associated with a higher risk of heart disease and osteoporosis (thinning of the bones), so your doctor may also monitor these areas. Outcomes vary from person to person, and no treatment can guarantee that joint damage will not progress, but a consistent management plan gives most people the best chance of maintaining function and quality of life.

Frequently asked questions

What are the early arthritis symptoms I should watch for?

Early arthritis symptoms are often subtle: joint stiffness in the morning or after sitting, mild aching after activity, slight swelling, or a joint that feels less flexible than before. In inflammatory types, several joints may feel stiff at once, and fatigue is common. These signs can also have other causes, so persistent symptoms lasting more than a few weeks are worth discussing with a doctor.

What is the difference between osteoarthritis and rheumatoid arthritis?

Osteoarthritis is mainly a mechanical, wear-related breakdown of cartilage that usually affects individual joints and worsens with use. Rheumatoid arthritis is an autoimmune disease in which the immune system attacks the joint lining, typically causing symmetrical swelling in the small joints of the hands and feet, prolonged morning stiffness, and general tiredness. The two are treated differently, which is why an accurate arthritis diagnosis is important.

How is arthritis diagnosed if my X-ray looks normal?

A normal X-ray does not rule out arthritis, because early cartilage loss and inflammation of the joint lining may not be visible. Your doctor may rely on the physical examination, blood tests for inflammation and specific antibodies, and ultrasound or MRI, which can show changes earlier than X-rays. In some cases, the diagnosis becomes clearer only after symptoms are observed over time.

Can arthritis be cured?

For most types of arthritis, there is no cure at present. However, treatment can often control symptoms, slow or prevent joint damage, and allow a normal daily life. Some forms, such as reactive arthritis after an infection, may resolve completely, and gout can usually be controlled to the point that attacks stop. Your doctor can explain what is realistic for your specific type.

What are the main arthritis treatment options without surgery?

Non-surgical arthritis treatment options include regular exercise and physical therapy, weight management, pain-relief and anti-inflammatory medicines, disease-modifying or biologic drugs for autoimmune types, urate-lowering medicines for gout, joint injections, and supportive devices such as braces or splints. Most people are managed without surgery, which is usually reserved for severe, persistent symptoms.

Does exercise make arthritis worse?

In general, appropriate exercise helps rather than harms arthritic joints. It strengthens supporting muscles, keeps joints flexible, helps with weight control, and can reduce pain over time. Very high-impact or repetitive loading may aggravate a badly damaged joint, so a physical therapist or doctor can advise on the type and amount of activity that suits you, particularly during a flare.

What are the most common arthritis causes in younger adults?

In younger adults, arthritis causes are more likely to be inflammatory or autoimmune, such as rheumatoid arthritis, psoriatic arthritis, or ankylosing spondylitis, or related to a previous joint injury, infection, or an inherited joint shape abnormality. Gout can also occur in younger men. Osteoarthritis in a young person usually follows an earlier injury or a structural problem in the joint.

When to see a doctor

Many people manage mild joint aches with rest and over-the-counter medicines, but certain situations call for medical assessment. In general, see a doctor if joint pain, stiffness, or swelling lasts more than a few weeks, keeps returning, interferes with daily activities or sleep, or affects several joints at once. Early evaluation is especially important for inflammatory arthritis, where prompt treatment can prevent lasting damage.

Seek urgent medical attention if you notice any of the following red-flag signs:

• A joint that is suddenly hot, red, very swollen, and extremely painful, especially with fever or chills, which may indicate a joint infection
• Joint pain following a significant injury, with inability to bear weight or a visibly deformed joint
• Sudden inability to move a joint
• Severe joint pain accompanied by unexplained weight loss, night sweats, or a new rash
• Numbness, tingling, or weakness in the arms or legs together with neck or back pain
• New or worsening symptoms while taking immune-suppressing arthritis medicines, particularly signs of infection
• Chest pain, shortness of breath, or eye pain and vision changes in someone with a known inflammatory arthritis

If you are unsure whether your symptoms are serious, it is reasonable to ask a healthcare professional rather than wait.