What Is Arthritis? Types, Symptoms, and Treatment Options Explained
Updated: Sep 8
Written by Dr. Charles Drew, Lead Pharmaceutical Content Specialist & Clinical Drug Information Reviewer
Reviewed for medical accuracy under the Ivermectinkart Editorial Policy
Introduction
Arthritis is not a single disease—it is a broad term covering more than 100 conditions that affect joints, tissues around joints, and other connective tissues. What is arthritis? In simple terms, arthritis involves joint problems that commonly cause pain and stiffness, although the underlying cause and pattern can differ considerably from one type to another. Osteoarthritis develops as joint tissues change and break down, rheumatoid arthritis is an autoimmune disease, and gout results from urate crystal buildup.
Because different forms require different approaches, getting the correct diagnosis matters more than simply treating every joint pain as “arthritis.” This guide explains the major types, common symptoms, diagnosis, treatment options, and signs that deserve medical attention.
What Is Arthritis and What Happens to Your Joints?
Arthritis describes conditions affecting the joints and surrounding tissues. A joint is where two bones meet, such as at your knee, hip, fingers, or elbow, and arthritis can cause pain, stiffness, swelling, warmth, and difficulty moving the affected joint. The different types of arthritis have different causes and treatments, and some can also affect organs outside the joints.
This distinction is important because arthritis does not always mean that a joint has simply “worn out” with age. Osteoarthritis, rheumatoid arthritis, gout, psoriatic arthritis, ankylosing spondylitis, and juvenile idiopathic arthritis are examples of conditions that fall within the broader arthritis family.
Some forms develop gradually, while others can cause sudden attacks. Some primarily affect individual joints, while systemic inflammatory forms can affect multiple joints and sometimes other parts of the body.
Joint pain does not automatically mean arthritis, and arthritis itself is not one diagnosis. Identifying the specific type matters because treatment that is appropriate for osteoarthritis may be very different from treatment needed for rheumatoid arthritis or gout.
What Are the Most Common Types of Arthritis?
There are more than 100 types of arthritis, but several forms account for many of the problems people encounter. Understanding their differences helps explain why symptoms and treatments can vary so much.
Osteoarthritis
Osteoarthritis, or OA, is the most common form of arthritis. It occurs when cartilage and other tissues within a joint gradually change and break down. It commonly affects the knees, hips, hands, neck, and lower back.
Typical symptoms include pain with joint use, reduced movement, swelling, and stiffness after resting. Morning stiffness often lasts less than 30 minutes. Osteoarthritis becomes more common with age, but previous joint injuries, abnormal joint structure, repetitive joint stress, family history, and excess body weight can also increase risk.
Rheumatoid arthritis
Rheumatoid arthritis, or RA, is different because it is a chronic autoimmune disease. The immune system mistakenly attacks the body's own tissues, producing inflammation in the lining of affected joints.
RA commonly causes pain, swelling, warmth, and prolonged stiffness. It frequently affects joints on both sides of the body—for example, both hands—and morning stiffness commonly lasts longer than 30 minutes. Fatigue, low-grade fever, and reduced appetite can also occur.
RA can affect more than the joints. In some people, it can cause problems involving the lungs, heart, eyes, skin, blood, and nerves.
Gout
Gout is an inflammatory form of arthritis caused when elevated urate levels eventually lead to needle-shaped crystals forming in and around joints.
A gout flare often begins suddenly and can cause intense pain, redness, warmth, and swelling. The big toe is a classic location, although other joints can be affected.
Not everyone with elevated blood urate develops gout. When gout does occur, appropriate treatment can control attacks and help prevent future flares and long-term joint damage.
Other forms of arthritis
Other important types include:
Psoriatic arthritis, which can occur in people with psoriasis.
Ankylosing spondylitis, an inflammatory form of arthritis that primarily affects the spine and related joints and ligaments.
Reactive arthritis, which can develop following an infection.
Juvenile idiopathic arthritis, an important group of arthritic conditions affecting children.
How three common types of arthritis differ
Feature | Osteoarthritis | Rheumatoid Arthritis | Gout |
Main process | Joint tissues gradually break down | Autoimmune inflammation | Urate crystals cause inflammation |
Typical pattern | Often develops gradually | Often affects joints symmetrically | Often causes sudden flares |
Common locations | Knees, hips, hands, neck, lower back | Hands, wrists, feet and other joints | Often big toe or another lower-limb joint |
Typical stiffness | Often brief after rest | Frequently prolonged after waking/rest | Severe pain and stiffness during a flare |
Other effects | Mainly joint-related | Can affect organs outside joints | Long-term disease can produce crystal deposits called tophi |
Treatment focus | Pain, function, movement and joint protection | Control inflammation and prevent damage | Treat flares and reduce future urate-related attacks |
What Are the Symptoms of Arthritis?
Joint pain and stiffness are among the most common arthritis symptoms, but the exact pattern depends on the type. Swelling, warmth, redness, reduced range of motion, and difficulty performing everyday activities may also occur.
Joint pain and tenderness
Arthritis pain can be constant or intermittent. With osteoarthritis, pain commonly becomes noticeable when using the affected joint and may improve with rest, although more advanced disease can cause pain at other times too.
Inflammatory arthritis may behave differently. Rheumatoid arthritis, for example, can produce pain both while moving and while resting.
Joint stiffness
The timing of stiffness can provide useful diagnostic information.
Osteoarthritis typically causes relatively short-lived stiffness after waking or inactivity. Rheumatoid arthritis often causes stiffness lasting longer than 30 minutes, particularly in the morning or after prolonged rest.
This pattern is helpful, but it cannot diagnose the condition by itself.
Swelling, warmth, or redness
Inflammation can make an affected joint swollen or warm. Gout can produce particularly sudden and intense swelling, redness, warmth, and pain during a flare.
Rheumatoid arthritis can similarly produce swollen, warm, tender joints, although its overall pattern is different.
Difficulty moving or performing everyday activities
Arthritis can reduce range of motion and make ordinary activities more difficult. Depending on the affected joints, a person may struggle with walking, climbing stairs, gripping objects, opening containers, getting out of a chair, or buttoning clothing.
Symptoms should therefore be considered in terms of both pain and their effect on daily function.
How Do Doctors Diagnose Arthritis?
There is no single test that diagnoses every type of arthritis. Healthcare professionals combine your symptom pattern and medical history with a physical examination and, when appropriate, imaging, laboratory tests, or examination of joint fluid.
A clinician may ask:
Which joints hurt?
When did the symptoms begin?
Did they develop suddenly or gradually?
How long does morning stiffness last?
Are joints swollen, red, or warm?
Do symptoms affect one side or both sides?
Do symptoms come and go?
Have you had an injury or infection?
Do you have psoriasis or another medical condition?
Is there a family history of arthritis?
Blood tests can be helpful for certain inflammatory conditions, but results must be interpreted alongside symptoms and examination findings. For rheumatoid arthritis specifically, NIAMS emphasizes that there is no single diagnostic test.
Gout may involve blood urate testing, but healthcare professionals can also examine fluid from an affected joint for urate crystals. Ultrasound or specialized CT imaging may sometimes help.
The goal is not simply to confirm that a joint hurts. It is to determine why it hurts so treatment can target the underlying problem.
What Arthritis Treatment Options Are Available?
Arthritis treatment options depend on the specific type, severity, affected joints, overall health, and impact on everyday life. Treatment can include physical activity and rehabilitation, pain-relieving or anti-inflammatory medicines, disease-specific medications, weight management when appropriate, assistive devices, and sometimes surgery.
Exercise and physical therapy
Avoiding movement completely is usually not the goal. Appropriate exercise can help maintain mobility, muscle strength, and physical function.
For osteoarthritis, NIAMS recommends exercise as a core treatment and describes options such as stretching and range-of-motion activities, strengthening exercises, water exercise, balance activities, walking, cycling, swimming, and other low-impact activities. Exercise and osteoarthritis treatment should be adapted to the individual's health and joint limitations.
Physical or occupational therapy may also help people modify activities, improve function, strengthen supporting muscles, and use assistive devices when necessary.
Pain-relieving and anti-inflammatory medicines
Depending on the arthritis type, medicines may include pain relievers, nonsteroidal anti-inflammatory drugs (NSAIDs), topical treatments, or corticosteroids.
These medicines are not appropriate for everyone. NSAIDs, for example, require additional caution in people with certain kidney, cardiovascular, gastrointestinal, or medication-related risks. Medication choice and duration should therefore be individualized rather than based only on how severe the pain feels.
Disease-modifying treatment for rheumatoid arthritis
Rheumatoid arthritis requires a different strategy because controlling the underlying autoimmune inflammation is important for limiting permanent damage.
Treatment may include disease-modifying antirheumatic drugs (DMARDs), biologic DMARDs, or targeted medicines such as Janus kinase (JAK) inhibitors. Rheumatoid arthritis treatment aims not only to relieve symptoms but also to decrease inflammation and prevent, slow, or stop joint and organ damage.
Early treatment matters because rheumatoid arthritis can begin causing irreversible joint damage relatively early in the disease.
Treatment for gout
Gout treatment has two related goals: controlling an acute attack and reducing the risk of future attacks and complications.
Anti-inflammatory medicines, colchicine, or corticosteroids may be used for gout flares depending on individual circumstances. Some people also require long-term urate-lowering treatment that addresses the underlying hyperuricemia.
Do not start, stop, or alter gout medication based only on an online uric acid target or someone else's treatment plan.
Surgery
Surgery is generally considered when substantial joint damage causes persistent pain or disability and other treatments are insufficient.
For severe osteoarthritis, procedures may include partial or total joint replacement. Whether surgery is appropriate depends on factors such as the affected joint, degree of damage, disability, overall health, and response to non-surgical treatments.
Arthritis treatment approaches and when they may be used
Treatment approach | Main purpose | Examples | Important context |
Physical activity/therapy | Preserve movement and function | Strengthening, mobility and low-impact exercise | Should suit the arthritis type and individual ability |
Pain management | Reduce pain and sometimes inflammation | Pain relievers, NSAIDs, topical medicines | Benefits and risks vary between individuals |
Corticosteroids | Reduce inflammation | Oral or joint-injected treatment in selected cases | Use depends on diagnosis and medical risks |
Disease-modifying medicines | Control inflammatory disease and prevent damage | DMARDs, biologics, targeted therapies | Mainly relevant to conditions such as RA |
Urate-lowering therapy | Prevent gout-related crystal buildup and future problems | Several prescription drug classes | Used according to the individual's gout history and risk |
Surgery | Restore function when joint damage is advanced | Joint replacement and other procedures | Usually considered after appropriate non-surgical care |
Can Lifestyle Changes Help You Manage Arthritis?
Lifestyle measures cannot replace disease-specific treatment, but they can play an important supporting role. Regular physical activity, maintaining a healthy weight when appropriate, protecting injured joints, and managing other health conditions can help support mobility and overall health.
Stay physically active
Pain can understandably make people reluctant to move, but prolonged inactivity may contribute to muscle weakness and reduced function.
Appropriate low-impact activities can be easier on affected joints. The right activity depends on which joints are affected, arthritis severity, general health, and current fitness.
Manage weight when appropriate
For people who have overweight or obesity, weight management may be particularly helpful when arthritis affects weight-bearing joints.
NIAMS notes that weight loss in people with overweight or obesity can reduce pain and improve mobility in osteoarthritis, particularly in joints such as the knees and hips.
Protect your joints without becoming inactive
Joint protection may involve changing how certain activities are performed, strengthening surrounding muscles, using supportive devices when recommended, and avoiding repetitive stress or injury.
The objective is not to stop using the joint completely. It is to find a safer balance between movement, activity, and symptom management.
Be careful with supplements marketed for arthritis
“Natural” does not automatically mean effective or risk-free. Supplements can have side effects, interact with medications, or have inconsistent evidence depending on the product and arthritis type.
Discuss supplements with a healthcare professional, particularly if you use anticoagulants, anti-inflammatory medicines, immune-modifying treatments, or several prescription medications.
When Should Joint Pain Be Checked by a Doctor?
Joint symptoms deserve medical assessment when they persist, repeatedly return, worsen, or interfere with normal activities. Earlier diagnosis can be particularly important when inflammatory arthritis is suspected because treatment may help prevent or limit irreversible joint damage.
Arrange medical evaluation if you experience:
persistent joint pain or stiffness
recurring or unexplained swelling
prolonged morning stiffness
progressive loss of movement
pain affecting sleep or everyday activities
symptoms affecting several joints
unexplained fatigue or fever alongside joint symptoms
repeated sudden attacks of severe joint pain
A suddenly very painful, hot, red, and swollen joint—especially with fever or feeling seriously unwell—needs prompt medical assessment. Although gout can cause dramatic inflammation, a joint infection can produce similar symptoms and may require urgent treatment.
New joint symptoms after significant trauma also warrant appropriate assessment, particularly if you cannot bear weight, the joint appears deformed, or pain is severe.
Conclusion
Understanding what is arthritis begins with recognizing that it describes many different joint conditions rather than one disease. Osteoarthritis, rheumatoid arthritis, and gout can all cause pain and impaired movement, but their underlying causes and treatments are different. Getting the correct diagnosis allows treatment to address both symptoms and, where possible, the disease process itself.
Modern treatment can help many people control pain, preserve mobility, and remain active. Persistent swelling, stiffness, or joint pain should therefore not simply be accepted as part of getting older. Discuss ongoing symptoms with a qualified healthcare professional, and seek prompt care for a suddenly hot, severely painful, swollen joint.
Frequently Asked Questions
1. What is the main cause of arthritis?
There is no single cause of arthritis. Osteoarthritis involves changes and breakdown of joint tissues, rheumatoid arthritis results from autoimmune inflammation, and gout develops when urate crystals accumulate in joints. Determining the type is therefore essential before deciding on treatment.
2. What are the first signs of arthritis?
Early symptoms commonly include joint pain, stiffness, swelling, or reduced movement. The pattern varies: osteoarthritis may cause brief stiffness after inactivity, while rheumatoid arthritis can cause prolonged morning stiffness and symmetrical swelling. Persistent symptoms should be medically assessed.
3. What is the most common type of arthritis?
Osteoarthritis is the most common type of arthritis. It frequently affects the knees, hips, hands, neck, and lower back and becomes more common with age. However, younger adults can develop osteoarthritis following joint injury or because of other risk factors.
4. Is arthritis curable?
There is no single cure for all forms of arthritis, but many types can be effectively managed. Treatment can reduce pain, improve function, control inflammation, and sometimes prevent or slow further joint damage. The appropriate strategy depends on the specific diagnosis.
5. Does exercise make arthritis worse?
Appropriate exercise generally forms an important part of arthritis management rather than automatically making the condition worse. Strengthening, mobility, and low-impact activities can support function and reduce symptoms in conditions such as osteoarthritis. Exercise should be adapted to your condition and physical abilities.
6. What type of doctor treats arthritis?
Primary care clinicians can evaluate many initial joint symptoms, while rheumatologists specialize in arthritis and rheumatic diseases. Depending on the condition, care may also involve physical therapists, occupational therapists, pain specialists, or orthopedic surgeons. The appropriate specialist depends on the suspected arthritis type.
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