The invention discloses a health maintenance product treating dermatitis through combined utilization and application thereof. The product is composed of an internal product and an external product; the internal product is prepared from semen coicis, cassia bark, semen persicae, sliced steamed liquor and black soya bean, herba portulacae, angelica sinensis, poria, fresh ginger, flos carthami and radix scutellariae; the external product is prepared from ginseng, cortex dictamni, fructus mume, pseudo-ginseng, radix cyathulae, radix astragali, rhizoma bletillae, herba portulacae, tribulusterrestris, angelica sinensis, radix paeoniae rubra, poria, radix lithospermi, rhizoma chuanxiong, sparrow drippings used for treating wounds, pearl powder, white stiff silkworm and ganoderma. According to anexperimental result, differences on dermatitis are obvious before and after the product is applied, it is suggested that the product has effects of dispelling wind and arresting itching, inducing diuresis and reducing edema, reinforcing qi and nourishing blood, and has obvious therapeutic effects for dermatitis treatment and skin damage recovery promotion; a method of simultaneous internal treatment and external treatment, the dermatitis treatment cycle can be shortened, and the therapeutic effect for treating the dermatitis is improved.