Arthritis is a general term for a group of more than 100 diseases. The word "arthritis" means "joint inflammation."

Arthritis is inflammation in and around the body’s joints. A joint is a point at which two or more bones come together, such as the hip or the knee. Inflammation is one of the body's natural reactions to disease or injury. Pain, stiffness, and swelling can result from inflammation.

Some types of arthritis include but are not limited to osteoarthritis, rheumatoid arthritis, psoriatic arthritis and gout.

Arthritis can cause loss of movement in some patients. The disorder limits everyday activities such as walking, dressing, and bathing for more than 40 million people worldwide. Arthritis is the leading cause of disability among Americans aged 15 and older. However, arthritis affects people in all age groups, including almost 300,000 children. More than 27 million people in the United States have osteoarthritis and an estimated 1.3 million have rheumatoid arthritis. More than half of those with arthritis are under 65 years of age. Nearly 60% of Americans with arthritis are women.

What are the symptoms of arthritis?
Different types of arthritis have different symptoms, which can range in severity from person to person. Osteoarthritis generally does not cause any symptoms outside the joint. Symptoms of other types of arthritis might include fatigue, fever, a rash, and the signs of joint inflammation, including:

  • Pain
  • Swelling
  • Stiffness
  • Tenderness
  • Redness
  • Warmth

(Cleveland Clinic)