An autoimmune disease is a condition where the immune system mistakenly attacks healthy cells, tissues, and organs in the body. There are over 80 known types of autoimmune diseases that can affect almost any part of the body. Some common autoimmune diseases include:

• Rheumatoid arthritis, a form of arthritis that attacks the joints
• Psoriasis, a condition marked by thick, scaly patches of skin
• Lupus, a chronic autoimmune disease that can damage any part of the body
• Multiple sclerosis, a disease that affects the brain and spinal cord
• Type 1 diabetes, a condition where the immune system attacks the pancreas
• Inflammatory bowel disease, a group of disorders that cause inflammation in the digestive tract

The exact cause of autoimmune diseases is unknown, but several theories suggest that an overactive immune system may attack the body after an infection or injury. Certain risk factors increase the chances of developing autoimmune disorders, including genetics, environmental factors, and lifestyle choices. Symptoms of autoimmune diseases vary depending on the type of disease and the affected body part, but common symptoms include fatigue, joint pain, skin rashes, and fever. There is no cure for most autoimmune diseases, but treatments aim to reduce symptoms and slow down the progression of the disease. Treatments may include medications, lifestyle changes, and in some cases, immunosuppressants.