Fatigue is a very common symptom in all stages of rheumatoid arthritis, particularly when the joint inflammation is active. Fatigue in rheumatoid arthritis can be caused by the body’s reaction to inflammation, poor sleep, anemia, and medications.
The fatigue of rheumatoid arthritis that results in lack of energy can adversely affect emotions and mood, occupation, relationships with people, sex drive, productivity, attentiveness, creativity, and happiness. Fatigue from rheumatoid arthritis can also be associated with poor appetite and weight loss
Joint pain from rheumatoid arthritis is caused by the inflammation present in a joint when the disease is active. Joint pain can also occur when the disease is inactive or controlled if the joint has been damaged by rheumatoid arthritis in the past.
Active rheumatoid arthritis causes the joint to swell because of both thickening of the joint lining tissue (synovium) and because of excess joint fluid. The swollen, inflamed joint stretches and irritates the capsule that surrounds the joint. The joint capsule has nerves endings within it that immediately send pain signals to the brain.
Past rheumatoid arthritis can lead to permanent joint destruction with damaged cartilage, bone, and ligaments. When the damaged joint is used, it can cause intense pain.
Rheumatoid arthritis characteristically leads to tenderness of involved joints. This is because the inflamed joint lining tissue has irritated the nerves in the joint capsule. When the irritated joint capsule is compressed by external pressure, such as from touching the joint, it is frequently tender. The pain elicited from compression is immediate. This is one of the reasons that rheumatoid arthritis can lead to difficulty sleeping and insomnia