The present invention relates to a composition for relieving and treating burns and bedsores comprising the animal lung tissue extract as an active ingredient, wherein the composition of the present invention suggests that the protective effect of animal lung tissue extract and/or propionic acid on skin damage is related to not only inflammation inhibition but also regeneration and angiogenesis of fibrous tissues. It can be used as a therapeutic agent for these diseases by exhibiting industrially available effects related to the treatment of burns and bedsores.