Joint inflammation is a medical condition that can be caused by two different illnesses: GOUT and arthritis. GOUT is a type of inflammatory arthritis caused by the buildup of uric acid in the joints, which can cause severe pain and swelling. Arthritis is an umbrella term for a group of conditions that cause joint pain and stiffness, including rheumatoid arthritis, osteoarthritis, and psoriatic arthritis. Both GOUT and arthritis can cause joint inflammation, which can lead to pain, stiffness, and difficulty moving the affected joint.