If the patient’s immune system is over-activated under the combination of genetic defects and predisposing factors, it may mistakenly attack its normal tissues and cells, resulting in organ and tissue damage in the body that leads to autoimmune diseases. Up till now, about 7.6-9.4% of the world’s population suffer from various types of autoimmune diseases. Generally, it is difficult to cure it after the onset of the disease. Most patients need long-term or even life-long medication.