A healthy joint is a carefully coordinated structure made up of several tissues, all of which can become sources of pain when damaged or inflamed.

• Cartilage covers the surfaces of bones where they meet and provides a smooth, cushioned surface for movement. When cartilage wears down, bones can rub against each other, causing pain and stiffness.
• Synovial membrane is the lining inside the joint capsule. It produces synovial fluid, which lubricates and nourishes the joint. When this lining becomes inflamed, it causes swelling, warmth, and discomfort.
• Ligaments are tough bands of tissue that hold bones together and keep the joint stable. A stretched or torn ligament causes pain and instability.
• Tendons attach muscles to bone and cross over joints. Inflammation of tendons near a joint can produce pain that mimics joint pain itself.
• Bursae are small fluid-filled sacs near joints that cushion bones and tendons. When they become inflamed, a condition called bursitis, pain around a joint can be intense even though the joint itself is not the source.

Understanding which part of the joint is involved helps explain the pattern and character of a person's pain and guides evaluation.

Joint pain has many potential causes, ranging from age-related wear to injury to systemic inflammatory conditions.

• Osteoarthritis is the most common cause of chronic joint pain, particularly in older adults. Often described as wear-and-tear arthritis, it occurs as the cartilage cushioning joint surfaces gradually breaks down over time. Pain from osteoarthritis typically worsens with activity and eases with rest, and stiffness is usually worst after periods of inactivity.
• Inflammatory arthritis, including rheumatoid arthritis and psoriatic arthritis, occurs when the immune system attacks joint tissue. These conditions often cause prolonged morning stiffness lasting more than an hour, along with swelling, warmth, and fatigue, and frequently affect multiple joints symmetrically.
• Gout is a type of inflammatory arthritis caused by the buildup of uric acid crystals in a joint. It typically causes sudden, severe pain and swelling, most often in the big toe, though other joints can be affected as well.
• Injury or trauma such as a sprain, strain, or fracture can cause acute joint pain, swelling, and instability.
• Bursitis and tendinitis cause pain around a joint that can easily be confused with pain arising from inside the joint itself.
• Infections can occasionally settle in a joint and cause intense pain, warmth, and swelling. This is known as septic arthritis and requires prompt medical attention.

Joint problems rarely produce pain alone. They often come with a cluster of related symptoms that can help identify the underlying cause.

Common symptoms include:

• Aching or throbbing pain in one or more joints, which may be constant or occur only with movement
• Stiffness that is worst after periods of rest, particularly upon waking in the morning
• Swelling around the joint, caused by fluid accumulation or inflammation of the joint lining
• Warmth or redness of the skin over the joint, which is common in inflammatory forms of arthritis
• Reduced range of motion, making it difficult to bend, straighten, or rotate the joint fully
• Creaking, grinding, or popping sensations during movement, known as crepitus
• Tenderness when pressing on or near the joint
• Fatigue in cases where the underlying cause involves systemic inflammation

Paying attention to patterns, such as whether pain is worse in the morning or after activity, whether one joint or several are involved, and whether symptoms appeared suddenly or gradually, can provide important clues for diagnosis.

• Age is one of the strongest risk factors, particularly for osteoarthritis. The older we are, the more wear our joints have accumulated over years of use.
• Previous joint injuries including sports injuries, workplace accidents, or falls can predispose a joint to earlier or more significant arthritis over time.
• Excess body weight places increased load on weight-bearing joints like the knees and hips, accelerating cartilage breakdown.
• Family history of arthritis or autoimmune disease can increase a person's susceptibility to developing similar conditions.
• Repetitive occupational movements that stress specific joints over many years can contribute to localized wear and pain.
• Gender plays a role in certain conditions. Osteoarthritis becomes more common in women after middle age. Rheumatoid arthritis also affects women more frequently than men.
• Underlying health conditions such as diabetes, gout, or autoimmune diseases can directly impact joint health and the likelihood of developing joint pain.

Joint pain is just a normal part of getting older and nothing can be done. While some degree of joint change is common with age, persistent joint pain deserves evaluation. There are many ways to support joint health and manage discomfort.

Cracking your knuckles causes arthritis. There is no credible evidence that cracking joints leads to arthritis. The sound typically comes from gas bubbles in the joint fluid releasing.

If the pain goes away, the problem is solved. Some joint conditions cause progressive changes even during periods of low pain. Evaluation is still valuable when symptoms fluctuate rather than resolve completely.

Only athletes or very active people get joint problems. Inactivity can also be hard on joints. Lack of movement weakens the muscles that support joints and reduces the circulation of nutrients to cartilage.

All joint pain is arthritis. Arthritis is just one of many causes. Bursitis, tendinitis, injury, and other conditions can all produce joint pain without any form of arthritis being present.

Healthy daily habits play a meaningful role in protecting joints and reducing discomfort over time.

• Stay active. Regular low-impact movement such as walking, swimming, or cycling supports joint health by maintaining surrounding muscle strength and promoting nutrient circulation to cartilage.
• Manage your weight. Maintaining a healthy weight reduces mechanical load on the knees, hips, and lower back.
• Warm up before physical activity. Gradually preparing joints for exercise reduces the risk of strain or injury.
• Use good body mechanics. Lifting with your legs rather than your back, and being thoughtful about how you carry loads, protects vulnerable joints from unnecessary stress.
• Avoid prolonged static positions. Sitting or standing in one position for extended periods can increase joint stiffness. Regular movement breaks help.
• Prioritize sleep. The body repairs tissue during sleep, and adequate rest supports overall joint and musculoskeletal health.

You should speak with a healthcare provider if you experience:

• Joint pain that has lasted more than a few weeks
• Swelling, warmth, or redness in a joint
• Pain that is interfering with daily activity, work, or sleep
• Progressive loss of range of motion in a joint
• Pain following an injury that does not improve with rest

Seek prompt care if you experience:

• Sudden, severe joint pain with significant swelling and heat, which may suggest gout or infection
• Joint pain alongside fever, which can indicate a systemic condition
• An inability to bear weight on a joint after injury