Symptoms and causes

The most common signs and symptoms of arthritis involve the joints. Depending on the type of arthritis you have, your signs and symptoms may include:

  • Pain
  • Stiffness
  • Swelling
  • Redness
  • Decreased range of motion

The two main types of arthritis — osteoarthritis and rheumatoid arthritis — damage joints in different ways.

Risk factors for arthritis include:

  • Family history. Some types of arthritis run in families, so you may be more likely to develop arthritis if your parents or siblings have the disorder. Your genes can make you more susceptible to environmental factors that may trigger arthritis.
  • Age. The risk of many types of arthritis — including osteoarthritis, rheumatoid arthritis and gout — increases with age.
  • Your sex. Women are more likely than are men to develop rheumatoid arthritis, while most of the people who have gout, another type of arthritis, are men.
  • Previous joint injury. People who have injured a joint, perhaps while playing a sport, are more likely to eventually develop arthritis in that joint.
  • Obesity. Carrying excess pounds puts stress on joints, particularly your knees, hips and spine. Obese people have a higher risk of developing arthritis.

Severe arthritis, particularly if it affects your hands or arms, can make it difficult for you to do daily tasks. Arthritis of weight-bearing joints can keep you from walking comfortably or sitting up straight. In some cases, joints may become twisted and deformed.