These factors may increase your risk of thumb arthritis:

  • Being female
  • Being age 40 or older
  • Having certain hereditary conditions, including joint ligament laxity and malformed joints
  • Experiencing injuries to your basal joint, such as fractures and sprains
  • Having diseases that change the normal structure and function of cartilage, such as rheumatoid arthritis
  • Performing certain activities and jobs that put high stress on this joint
Jun. 19, 2012