Leek belongs to photosensitive vegetables, and it is not recommended for patients with lupus erythematosus to eat leek. Lupus erythematosus is a systemic autoimmune disease that is caused by genetic, environmental and other factors that lead to immune dysfunction, causing damage to multiple organs. There is no direct evidence that the onset of lupus erythematosus, disease activity and diet have a direct correlation. Lupus erythematosus patients can be triggered by exposure to ultraviolet light, so ultraviolet light exposure should be avoided as much as possible. Some foods such as fungus, celery, mushrooms, and leeks may increase the body’s photosensitivity to UV light, so leeks are not recommended for people with lupus erythematosus. Whether or not you eat leeks you need to avoid direct exposure to ultraviolet light from the sun. In addition to paying attention to lifestyle behaviors, patients with lupus erythematosus should actively consult the Rheumatology and Immunology Department of the hospital for standardized treatment under the guidance of doctors and regular follow-up.