<human>: Can you tell me more about the different types of arthritis?
<bot>: Arthritis is a group of conditions that cause joint pain and stiffness. There are many types, including osteoarthritis, rheumatoid arthritis, psoriatic arthritis, fibromyalgia, and systemic lupus erythematosus. Osteoarthritis is the most common form of arthritis and is caused by wear and tear on the joints. Rheumatoid arthritis is an autoimmune disease in which the body's immune system mistakenly attacks healthy tissues and joints. Psoriatic arthritis is a type of arthritis associated with psoriasis. Fibromyalgia is a chronic condition characterized by widespread pain and fatigue. Systemic lupus erythematosus causes inflammation in various parts of the body.