A rash is a skin lesion. There are various forms of manifestation, from a simple change in skin color to an elevation of the skin surface or the occurrence of blisters. Types of rashes ①The ones that are not raised on the skin are called spots. There are various types of spots: erythema (scarlet fever, measles, drug rash, etc.), which is reddened due to dilation of blood vessels, and erythema (purple spot), in which subcutaneous hemorrhage occurs, and so on. Purple spots are subdivided into small punctate hemorrhages or called bruises (less than 2 mm) 2-5 mm in diameter, and bruises more than 5 mm in diameter. These spots, often change from red or purple to brown or yellow until they finally disappear. From the rash to disappear, some to two weeks, some as long as 2-3 days. An increase in skin pigmentation that changes the skin is called a pigmented spot. In contrast to pigmented patches, white skin is called leucoderma, which is represented by vitiligo (normal white patches). ②A raised skin surface is usually called a papule, and a large one is called a nodule. If there is clear fluid in the skin, it is called a blister. Liquid yellowish is called pustules. Measles for spot or rash can be, heat 3 days, out 3 days, back 3 days for the typical performance.