Osteoarthritis is the most common form of arthritis, affecting millions of people worldwide. You get it when the cartilage on the ends of your bones in the joints wears down over time.
Although osteoarthritis can damage any joint in your body, the disorder most commonly affects joints in your hands, knees, hips and spine. The disease is irreversible but the symptoms can usually be effectively managed.
Eating healthily and exercising, maintaining a healthy weight and other treatments may slow progression of the disease and help improve pain and joint function. If you have joint pain or stiffness that doesn’t go away, make an appointment with your doctor.
Osteoarthritis is a degenerative disease that worsens over time. Joint pain and stiffness may become severe enough to make daily tasks difficult.
Symptoms
Osteoarthritis symptoms often develop slowly and worsen over time.
Signs and symptoms of osteoarthritis include:
Pain. The joint may hurt during or after movement.
Tenderness. The joint may feel pain when you apply light pressure to it.
Stiffness. Joint stiffness may be most noticeable when you wake up in the morning or after a period of inactivity.
Loss of flexibility. You may not be able to move your joint through its full range of motion.
Grating sensation. You may hear or feel a grating sensation when you use the joint.
Bone spurs. These extra bits of bone, which feel like hard lumps, may form around the affected joint.
Causes
Osteoarthritis occurs when the cartilage that cushions the ends of bones in your joints gradually deteriorates. Cartilage is a firm, slippery tissue that permits nearly frictionless joint motion.
In osteoarthritis, the surface that is normally smooth of the cartilage becomes rough. Eventually, if the cartilage wears down completely, you may be left with bone rubbing on bone.
Risk factors
Factors that may increase your risk of osteoarthritis include:
Older age. The risk of osteoarthritis increases with age.
Sex. Women are more likely to develop osteoarthritis, although it isn’t clear why.
Obesity. Carrying extra body weight contributes to osteoarthritis in several ways and the more you weigh, the greater your risk. Increased weight puts added stress on weight-bearing joints, such as your hips and knees. In addition, fat tissue produces proteins that may cause harmful inflammation in and around your joints.
Joint injuries. Injuries, such as those that occur when playing sports, or from an accident, may increase the risk of osteoarthritis. Even injuries that occurred many years ago and seemingly healed can increase your risk of osteoarthritis.
Certain occupations. If your job includes tasks that place repetitive stress on a particular joint, that joint may eventually develop osteoarthritis.
Genetics. Some people inherit a tendency to develop osteoarthritis.
Bone deformities. Some people are born with malformed joints or defective cartilage, which can increase the risk of osteoarthritis.
Diagnosis
During the physical exam, your doctor will closely examine your affected joint, checking for tenderness, swelling or redness, and for range of motion in the joint. Your doctor may also recommend imaging and lab tests.
Imaging tests Pictures of the affected joint can be obtained during imaging tests. Examples include:
X-rays. Cartilage doesn’t show up on X-ray images, but cartilage loss is revealed by a narrowing of the space between the bones in your joint. An X-ray may also show bone spurs around a joint. Some people may have X-ray evidence of osteoarthritis before they experience any symptoms.
Magnetic resonance imaging (MRI). An MRI uses radio waves and a strong magnetic field to produce detailed images of bone and soft tissues, including cartilage. An MRI isn’t commonly needed to diagnose osteoarthritis but may help provide more information in complex cases.
Lab tests. Analysing your blood or joint fluid can help confirm the diagnosis.
Blood tests. Although there is no blood test for osteoarthritis, certain tests may help rule out other causes of joint pain, such as rheumatoid arthritis.
Joint fluid analysis. Your doctor may use a needle to draw fluid out of the affected joint. Examining and testing the fluid from your joint can determine if there’s inflammation and if your pain is caused by gout or an infection.
Treatment
Currently, the process underlying osteoarthritis cannot be reversed, but symptoms can usually be effectively managed with lifestyle changes, physical and other therapies, medications and surgery.
Exercising and achieving a healthy weight are generally the most important ways to treat osteoarthritis.
Your doctor may also suggest:
Medications Osteoarthritis symptoms, primarily pain, may be helped by certain medications, including:
Paracetamol It has been shown to be effective for people with osteoarthritis who have mild to moderate pain. Taking more than the recommended dosage of painamol can cause liver damage.
Nonsteroidal anti – inflammatory drugs (NSAIDs). Over -the – counter NSAIDs, including ibuprofen, indomethacin and naproxen sodium, taken at the recommended doses, typically relieve osteoarthritis pain. Stronger NSAIDs, available by prescription, may also slightly reduce inflammation along with relieving pain. NSAIDs can cause stomach upset, cardiovascular problems, bleeding problems and liver and kidney damage.
Amitryptiline. Normally used as an antidepressant, this medication is also approved to treat chronic pain.
Therapy
Physiotherapy. A physiotherapist can work with you to create an individualised exercise programme that will strengthen the muscles around your joint, increase your range of motion and reduce pain. Regular gentle exercise that you do on your own, such as swimming or walking, can be equally effective.
Occupational therapy. An occupational therapist can help you discover ways to do everyday tasks or do your job without putting extra stress on your already painful joint. For instance, a toothbrush with a large grip could make brushing your teeth easier if you have finger osteoarthritis. A bench in your shower could help relieve the pain of standing if you have knee osteoarthritis.
Tai chi and yoga. These movement therapies involve gentle exercises and stretches combined with deep breathing. Many people use these therapies to reduce stress in their lives, and research suggests that tai chi and yoga may reduce osteoarthritis pain and improve movement. When led by a knowledgeable instructor, these therapies are safe. Avoid moves that cause pain in your joints.
Surgical and other procedures
If conservative treatments does not help, you may want to consider procedures such as:
Cortisone injections. Injections of corticosteroid medications may relieve pain in your joint. During this procedure your doctor numbs the area around your joint, then places a needle into the space within your joint and injects medication. The number of cortisone injections you can receive each year is generally limited to three or four injections, because the medication can worsen joint damage over time.
Lubrication injections. Injections of hyaluronic acid may offer pain relief by providing some cushioning in your knee, though some research suggests these injections offer no more relief than a placebo. Hyaluronic acid is similar to a component normally found in your joint fluid.
Realigning bones. If osteoarthritis has damaged one side of your knee more than the other, an osteotomy might be helpful. In a knee osteotomy, a surgeon cuts across the bone either above or below the knee, and then removes or adds a wedge of bone. This shifts your body weight away from the worn-out part of your knee.
Joint replacement. In joint replacement surgery, your surgeon removes your damaged joint surfaces and replaces them with plastic and metal parts. Surgical risks include infections and blood clots. Artificial joints can wear out or come loose.
