1. Normal ageing process and wear and tear are the likely factors for causing lack of elasticity and flexibility of the cartilage in the joints.
2. Over straining the back may cause damage to the ligaments and other vertebral discs.
3. Occupation and lifestyle may also be related to arthritis. For example, a particular kind of posture or strain on a particular joint may cause osteoarthritis of that part of the joint.
4. Excessive weight may also affect the larger weight bearing joints-chiefly hips, knees and spine.
5. Hereditary factor - incidence of rheumatoid arthritis is higher than expected in twins and first-degree relations.
6. Rise in uric acid in blood serum is likely to cause gout.
7. Mental tension/stress cannot be ruled out for the emotional and physical manifestation of the disease, pain and depression.
8. Damp and cold weather often causes and aggravates this disease.
9. Having stiffness or pain when you move, could be a sign of arthritis.

Other factors that can cause arthritis:

• Hidden birth defects
  
• Injuries
  
• Infections
  
• Drug side effects
  
• Biomechanical factors
  
• Nutritional deficiencies
  
• Hormonal factors
  
• Altered immune system