Arthritis - Symptoms & Causes

Q: What causes arthritis?

In osteoarthritis , the cartilage, or the connective tissue that protects the joints, breaks down due to the overuse of the affected joint. This is usually due to ageing, but can also happen to young people as a result of past sports injuries, such as dislocation of the shoulder or knee. In rheumatoid arthritis , the immune system attacks the body instead of protecting it, causing the joints to swell.

Symptoms & Causes Diagnosis & Treatment Our Expertise & Doctors FAQ

What is arthritis?

Osteoarthritis and rheumatoid arthritis both cause pain and swelling in the joints.

Arthritis refers to the inflammation of the joints, which causes pain and swelling. It can occur in both small joints (e.g. fingers) and large joints (e.g. hip or knee). The joints can become stiff or deformed, resulting in increased disability or decreased mobility.

Types of arthritis

There are 2 types of arthritis:

Osteoarthritis

Osteoarthritis is the most common form of arthritis. It is also called "wear-and-tear" in joints where the cartilage within a joint starts to wear out. This causes the bones to rub against each other and the joints to become painful, stiff or swollen. This condition usually affects the hands, hips, knees, neck and lower back.

Rheumatoid arthritis

Also known as gout or inflammatory arthritis, is an autoimmune and chronic inflammatory disorder. It occurs when the immune system wrongly attacks the body's healthy cells, leading to inflammation of the affected body part. Rheumatoid arthritis can affect your joints and other body parts such as blood vessels, eyes, mouth, heart, lungs, and skin.

What are the symptoms of arthritis?

If you have osteoarthritis, it worsens as the day progresses. By evening, you are likely to feel a dull ache in the affected joint.

Other symptoms of arthritis include:

Pain
Stiffness of the affected joints
Swelling in the affected joints
Changes in surrounding joints
Cysts (lumps) in the hand that may cause ridging or dents in the nail plate of the affected finger
A sensation of grating or grinding in the affected joint caused by rubbing of the damaged cartilage surface (called crepitation)
Warmth, as the joint may feel warm to the touch

What causes arthritis?

In osteoarthritis, the cartilage, or the connective tissue that protects the joints, breaks down due to the overuse of the affected joint. This is usually due to ageing, but can also happen to young people as a result of past sports injuries, such as dislocation of the shoulder or knee.

In rheumatoid arthritis, the immune system attacks the body instead of protecting it, causing the joints to swell.

What are the risk factors for arthritis?

The risk factors for arthritis include:

Occupations that require repetitive physical movements such as kneeling, lifting and climbing stairs.
Age. Although osteoarthritis can happen at any age, it is most prevalent in people in their 50s. The disease begins gradually and worsens over time. Rheumatoid arthritis is also more common in middle-aged people.
Gender. Osteoarthritis affects more women than men.
Genetics or family history
Being overweight or obese
Lack of physical activities
Poor posture
Past injuries
Infection
Smoking