Systemic lupus erythematosus (SLE) is an autoimmune disease that can affect multiple systems and organs throughout the body and is more commonly seen in women, particularly during their childbearing years. Clinically, it is mainly characterized by fever, rash, joint pain, oral ulcers, and hair loss. In terms of diet, it is recommended to eat light and avoid spicy and irritating foods. It is crucial to strictly abstain from smoking and drinking, avoid excessive fatigue, and direct sun exposure. Importantly, patients should strictly follow medical advice regarding medication and have regular check-ups.