The atopic skin lesions of lymphoma are commonly: exfoliative erythrodermia, intradermal nodules or plaques, or ulcers. Malignant histiocytosis-specific skin lesions are mainly diffuse or nodular heterogeneous histiocytic infiltrations in the dermis, subcutaneous adipose tissue and around blood vessels, hair follicles, sweat glands, and sebaceous glands, manifesting as pleomorphic skin lesions, which may be erythema, papules, blisters, blisters, plaques, nodules, or ulcers, with no certain site of predilection, one or several types of rashes, which may fade on their own or may be recurrent, and masses It can be progressively enlarged, broken, and persistent, etc.