When a female patient develops vulvar itching, it is often the first symptom of diabetes, that is, when she visits a doctor for vulvar itching, blood glucose monitoring reveals elevated blood glucose levels, mainly manifesting as vulvar itching, which is unbearable, and vaginal discharge examination reveals fungus, which is often combined with mycosis fungoides. Therefore, once diabetic patients are diagnosed with mycosis fungoides, they should control their blood sugar, which is the basis of treatment, and then follow the medication for mycosis fungoides, which will significantly improve the symptoms of vulvar itching.