Fire-irritated erythema, in layman’s terms, is “skin erythema pigmentation” caused by long-term exposure to excessive heat. Usually located on the legs, such as winter prolonged close contact with the stove, indoor radiators, some girls use hot water bags, etc.. Occasionally, it is seen that the long-term use of electric blankets leads to back or put the laptop on the thighs to lead to “fire erythema” of the thigh skin. When the above-mentioned undesirable factors are eliminated, most of the skin can be restored to normal, but very few people may be left with permanent hyperpigmentation.