Autoimmune disorders occur when the body's immune system mistakenly attacks its own healthy cells, thinking they are foreign invaders. This can lead to inflammation and damage in various parts of the body. Common examples of autoimmune disorders include rheumatoid arthritis, lupus, and multiple sclerosis. The exact cause of autoimmune disorders is not fully understood, but factors like genetics, infections, and environmental triggers may play a role. Symptoms can vary widely, ranging from fatigue and joint pain to skin rashes and digestive issues. Early diagnosis and treatment are essential for managing these conditions effectively.