Morning stiffness in women is commonly associated with rheumatoid arthritis and osteoarthritis, as follows: 1. rheumatoid arthritis: an immune-mediated erosive arthritis, clinically manifested as generalized symmetrical multi-joint swelling and pain with morning stiffness, often lasting more than an hour. In addition to joint involvement, it can also involve other organs, more commonly the lungs, and a significant proportion of patients can be combined with interstitial lung fibrosis. 2.