Mycosis fungoides, also known as mycosis fungoides, is a low-grade malignant cutaneous T-cell lymphoma that originates from memory helper T cells. The course of the disease is chronic and progressive, initially erythema and infiltrative damage in many forms, later may develop into a tumor, late stage may involve lymph nodes and viscera, mycosis fungoides can be divided into three stages according to clinical performance. The erythematous phase is also known as mycosis fungoides. The former is a flat, pale red, scaly plaque, which develops rapidly and can enter the plaque stage within months or years, and even visceral lesions, while the latter is an atrophy of the skin, or wrinkles with capillary dilation, hyperpigmentation or hypopigmentation, which can exist for a long time without change. The lesions mostly occur on the trunk itching is the only conscious symptom in the early stage, but this itching is unbearable and difficult to be relieved by conventional treatment, and can persist for a long time. The second plaque stage, also known as the infiltration stage, is developed by the erythema stage, the infiltration of this stage is increasing, often in the form of dark red ring or irregular raised plaque, the surface is tense and bright, high and low, infiltrated plaque can be repeated throughout the body. It can also be limited to certain parts of the primary lesion site. In the third tumor stage, tumors gradually appear on the basis of infiltrating plaques, often occurring in the infiltrating plaques of achievement or at the edges or in the center. This machine can also be seen as lymph node enlargement, internal organs can also have lesions, there is also the selection of mycosis fungoides species treatment, etc., the purpose of which includes the removal of skin lesions to improve the quality of life, prolong the disease-free survival rate and survival with disease, early treatment can take symptomatic treatment of expectant therapy or skin-targeted therapy, while patients with advanced stage generally consider chemotherapy.