Summary of case history,　Patient Yang, male, 67 years old, sought medical attention on February 26, 2023 due to repeated episodes of systemic erythema and papule peeling for over 6 months, which worsened for 1 week. The patient developed scattered erythema, papules, and itching throughout the body without any obvious cause more than 6 months ago. Initially, they sought medical attention from a local community hospital, where doctors planned to diagnose "eczema" and treated it with Western medicine (specific details are unknown). The rash gradually subsided, but after eating carelessly, the rash continued to recur. Seven days ago, he reported that after eating shrimp and crabs, his whole body developed red papules again, accompanied by severe itching. However, he did not improve after taking "cetirizine 1 # qd". Therefore, he came to my hospital for consultation. Chenxia: Whole body papules, scattered and widespread, mainly in the waist, severe itching, dark and heavy skin, dry and scabbed, without accompanied desquamation, no exudate, normal chills, cold limbs without sweat, occasional dry cough, waist soreness and bloating, moderate sleep intake, both bowel movements are adjusted, the mouth is not dry or bitter, there is no discomfort, the tongue is light, dark and fat, the fur is white and slightly greasy, and the pulse is floating and smooth.,TCM diagnosis,　eczema ( Cold dampness bundle syndrome ),Western medicine diagnosis,　eczema,Therapeutic methods,　The treatment method is to expel wind and nourish blood, dispel cold and dampness, and select the modified Baidu Powder.,Clinical outcomes,　Improvement.