The so-called lipstick effect refers to an interesting economic phenomenon. In the United States, whenever the economy is depressed, the sales of lipstick will soar. Because Americans think lipstick is a relatively cheap consumer product, in the case of economic recession, people will still have a strong desire to consume and will turn to buy cheaper goods. As a "cheap and unnecessary thing", lipstick can play a "comfort" role for consumers, especially when soft and moist lipstick touches the lips. Moreover, the economic recession will reduce the income of some people, so it is difficult for them to save money to do some "big things", such as buying a house, buying a car and traveling abroad. So that there will be some "small spare money" in hand, just to buy some "cheap unnecessary things".