TCM think it that caused by wind-heat attacking and humid heat stasis depositing in skin. In acute period the defect mainly caused from humid heat stasis, or splenasthenic fluid-retention. If recurrent attacks, protraction and no treatment,hemopenia would generat wind and dryness-syndrome, the skin lose nutrition. So it would become chronic eczema.
Location cupped and methods:
Acupoints selected: Dazhui, Lingtai, Feishu (BL 13), Quchi (LI 11), Xuehai (SP 10), Sanyinjiao (SP6), Shenque and focus of infection
Cupping methods:
You should use only cupping on focus of infectionl; for the worse one, you should use venesection of cupping or acupuncture needle cupping, with Dazhui and Lingtaixue added. You should keep the cups for 10-15 minutes once every 1-2 days; if you can not keep the cups on the focus of infection, you should use cupping of venesection or cuping by acupuncture needle and retain the cup for 10-15 minutes once every other 1-2 days.