<s>[INST] Why is my arthritis worse in the morning? [/INST] Arthritic joints tend to be inflamed. Movement keeps fluids moving through joints. But when we rest, inflammatory fluids build up in the joint. This fluid makes the joint tight, meaning more pain and stiffness when we start to move it. Source: Woodside Clinic. Link: https://www.woodsideclinic.co.uk/common-questions-about-arthritis. Field: Rheumatology. Disease: Arthritis </s>