1. **Osteoarthritis**: Common in middle-aged adults, causing joint pain and stiffness due to cartilage wear. 2. **Rheumatoid Arthritis**: An autoimmune disorder leading to joint inflammation and pain. 3. **Gout**: Uric acid crystal buildup in joints, causing sudden severe pain, often in the big toe. 4. **Injuries or Overuse**: Past injuries or repetitive strain can lead to joint pain from inflammation. 5. **Infections**: Septic arthritis can cause joint pain, swelling, and fever, needing urgent care. 6. **Other Inflammatory Conditions**: Conditions like psoriatic arthritis or lupus can cause joint pain. 7. **Bursitis or Tendinitis**: Inflammation of bursae or tendons around joints causing localized pain. 8. **Age-related Changes**: Natural aging can lead to cartilage thinning and joint discomfort. Given your history of colitis and ulcerative proctitis, these conditions may also contribute to joint pain. Consult a healthcare professional for a precise diagnosis and treatment plan.