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皮肤是保护人体的第一道防线,外来各种不良刺激,包括:机械的、物理的、化学的和生物的刺激都可使皮肤受到损害而发生皮肤病。如过度日晒可使人发生日光性皮炎;潮湿和寒冷的刺激可使人发生冻疮;染料、化工原料和药物可使人发生接触性皮炎和药疹;疥虫可使人患疥疮等等。除外部原因外,饮食、代谢障碍、
Skin is the first line of defense to protect the human body, a variety of adverse external stimuli, including: mechanical, physical, chemical and biological stimuli can cause skin damage and skin diseases. Such as excessive sun exposure can make people sun dermatitis; moist and cold stimulation can make people frostbite; dyestuffs, chemical raw materials and drugs can cause contact dermatitis and drug eruptions; pinworm can make people suffering from scabies and so on. In addition to external reasons, diet, metabolic disorders,