What is arthritis?
Arthritis is a joint disorder featuring inflammation. A joint is an area of the body where two different bones meet. A joint functions to move the body parts connected by its bones. Arthritis literally means inflammation of one or more joints.

Arthritis is frequently accompanied by joint pain. Joint pain is referred to as arthralgia.

There are many forms of arthritis (over 100 and growing). The forms range from those related to wear and tear of cartilage (such as osteoarthritis) to those associated with inflammation resulting from an overactive immune system (such as rheumatoid arthritis). Together, the many forms of arthritis make up the most common chronic illness in the United States.

The causes of arthritis depend on the form of arthritis. Causes include injury (leading to osteoarthritis), abnormal metabolism (such as gout and pseudogout), inheritance, infections, and unclear reasons (such as rheumatoid arthritis and systemic lupus erythematosus).

Arthritis is classified as one of the rheumatic diseases. These are conditions that are different individual illnesses, with differing features, treatments, complications, and prognosis. They are similar in that they have a tendency to affect the joints, muscles, ligaments, cartilage, tendons, and many have the potential to affect internal body areas.

What are symptoms of arthritis?
Symptoms of arthritis include pain and limited function of joints. Inflammation of the joints from arthritis is characterized by joint stiffness, swelling, redness, and warmth. Tenderness of the inflamed joint can be present.

Many of the forms of arthritis, because they are rheumatic diseases, can cause symptoms affecting various organs of the body that do not directly involve the joints. Therefore, symptoms in some patients with certain forms of arthritis can also include fever, gland swelling, weight loss, fatigue, feeling unwell, and even symptoms from abnormalities of organs such as the lungs, heart, or kidneys.

Who is affected by arthritis?
Arthritis sufferers include men and women, children and adults. Approximately 350 million people worldwide have arthritis. Nearly 40 million persons in the United States are affected by arthritis, including over a quarter million children!

More than 21 million Americans have osteoarthritis. Approximately 2.1 million Americans suffer from rheumatoid arthritis.

More than half of those with arthritis are under 65 years of age. Nearly 60% of Americans with arthritis are women.

How is arthritis diagnosed and why is a diagnosis important?
The first step in the diagnosis of arthritis is a meeting between the doctor and the patient. The doctor will review the history of symptoms, examine the joints for inflammation and deformity, as well as ask questions about or examine other parts of the body for inflammation or signs of diseases that can affect other body areas. Furthermore, certain blood, urine, joint fluid, and/or x–ray tests might be ordered. The diagnosis will be based on the pattern of symptoms, the distribution of the inflamed joints, and any blood and x–ray findings. Several visits may be necessary before the doctor can be certain of the diagnosis. A doctor with special training in arthritis and related diseases is called a rheumatologist (see below).

Many forms of arthritis are more of an annoyance than serious. However, millions of patients suffer daily with pain and disability from arthritis or its complications.

Earlier and accurate diagnosis can help to prevent irreversible damage and disability. Properly guided programs of exercise and rest, medications, physical therapy, and surgery options can idealize long–term outcomes for arthritis patients.

It should be noted that both before and especially after the diagnosis of arthritis, communication with the treating doctor is essential for optimal health. This is important from the standpoint of the doctor, so that he/she can be aware of the vagaries of the patient’s symptoms as well as their tolerance to and acceptance of treatments. It is important from the standpoint of patients, so that they can be assured that they have an understanding of the diagnosis and how the condition does and might affect them. It is also crucial for the safe use of medications.

Source: www.medicinenet.com