A rash is a skin lesion. There are a variety of manifestations ranging from a simple change in the color of the skin to an elevation of the surface of the skin 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.) where blood vessels are dilated and reddened, and erythema (purple spot) where subcutaneous hemorrhage occurs. 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.