Osteoarthritis

Overview

Osteoarthritis is a common joint condition that develops when the protective cartilage covering the ends of bones gradually wears down. Cartilage helps joints move smoothly and cushions them during daily activities. When it becomes thinner or damaged, the bones and surrounding tissues may become irritated, leading to pain, stiffness and reduced movement.

Osteoarthritis can affect many joints, but it most often involves the knees, hips, hands, spine and feet. It usually develops slowly over time and may be more noticeable during activities such as walking, climbing stairs, gripping objects or standing for long periods. Although osteoarthritis is more common with age, it is not simply an inevitable part of aging. Many factors can influence how and when it appears.

With appropriate medical guidance, many people can manage symptoms, protect joint function and maintain daily activities. Orthopedic specialists can assess joint health, recommend non-surgical care and discuss surgical options when needed.

Symptoms

Symptoms of osteoarthritis can vary depending on the joint involved and the severity of the condition. They may come and go, and they often progress gradually.

• Joint pain during or after movement
• Stiffness, especially after rest or in the morning
• Reduced flexibility or limited range of motion
• Swelling or tenderness around the joint
• A grinding, clicking or cracking sensation during movement
• Weakness or a feeling that the joint is less stable
• Changes in joint shape, particularly in the fingers or knees
• Difficulty with everyday tasks, such as walking, dressing, climbing stairs or opening jars

In some people, symptoms are mild and manageable. In others, osteoarthritis can interfere with work, sleep, mobility and quality of life. Pain that becomes persistent or limits normal activities should be assessed by a healthcare professional.

Causes and Risk Factors

Osteoarthritis develops when the structures within and around a joint are affected by wear, stress or injury over time. Cartilage damage is a key feature, but osteoarthritis can also involve changes in bone, ligaments, tendons and the joint lining.

Several factors may increase the risk of osteoarthritis:

• Age, as joint tissues may become more vulnerable over time
• Previous joint injury, such as a fracture, ligament injury or meniscus injury
• Repetitive joint stress from work, sports or certain daily activities
• Excess body weight, which increases stress on weight-bearing joints such as the knees and hips
• Family history or inherited joint characteristics
• Joint alignment problems, such as bowed legs or uneven weight distribution
• Muscle weakness, which may reduce support around the joint
• Certain metabolic or inflammatory conditions that can affect joint health

Having one or more risk factors does not mean a person will definitely develop osteoarthritis. Likewise, osteoarthritis can occur even without an obvious cause.

Diagnosis

Diagnosis begins with a medical history and physical examination. The doctor may ask about the location of pain, how symptoms started, what activities make them worse or better, and whether there has been a previous injury. During the examination, the joint may be checked for tenderness, swelling, movement, strength, stability and alignment.

Imaging tests may be used to help evaluate the joint. X-rays can show changes such as narrowing of the joint space, bone spurs or changes in bone shape. In some cases, more detailed imaging may be recommended to look at soft tissues or to clarify the diagnosis.

Blood tests are not used to confirm osteoarthritis itself, but they may help rule out other causes of joint pain, such as inflammatory arthritis or infection, when symptoms suggest another condition. In certain situations, fluid may be taken from a swollen joint for laboratory analysis.

A careful diagnosis is important because different joint conditions can cause similar symptoms but may require different treatment approaches.

Treatment Options

Treatment for osteoarthritis is tailored to the affected joint, symptom severity, general health and the person’s daily needs. The goal is to reduce pain, improve function and support joint health.

Non-surgical treatment is often the first approach. It may include education about joint protection, activity modification and weight management when appropriate. Physiotherapy can help improve strength, flexibility, balance and movement patterns. Low-impact exercise may support joint mobility and overall health, when recommended by a healthcare professional.

Supportive devices may be useful for some people. These can include braces, shoe inserts, walking aids or ergonomic tools that reduce strain on affected joints. Heat, cold or other physical therapy methods may be used as part of a broader care plan.

Medications may be recommended by a doctor to help control pain or inflammation, depending on the individual’s medical history and risk factors. In some cases, injections into the joint may be considered to reduce symptoms for a period of time.

If symptoms remain severe despite non-surgical care, or if joint damage significantly limits mobility and daily life, surgery may be discussed. Surgical options vary by joint and may include procedures to realign, repair or replace a joint. An orthopedic specialist can explain the potential benefits, limitations and risks of each option.

When to See a Doctor

Medical evaluation is recommended if joint pain persists, worsens over time or interferes with normal activities. It is also important to seek care if there is noticeable swelling, reduced movement, joint instability or difficulty walking.

Prompt medical attention is needed if joint pain follows a significant injury, if the joint becomes very swollen or red, or if pain is accompanied by fever or a general feeling of illness. These symptoms may suggest conditions other than osteoarthritis that require timely assessment.

People who already have osteoarthritis should also consult a doctor if symptoms change suddenly, if usual activities become harder, or if current management no longer provides adequate relief. Early assessment can help identify the cause of changes and guide appropriate treatment planning.