In this report, we will touch upon one of the very interesting and lit-tle-studied topics: prohibitions and prescriptions in traditional culture associated with the appearance of a large birthmark in a person. Earlier we touched upon the topic of prohibitions and prescriptions in the traditional culture of the Slavs [Za-porozhets 2011 a), 2018]. The presented report continues this topic in a narrower direction - the reasons for the appearance of a large birthmark in a person in the concept of a people. The stories were recorded in Moscow, from people who came to the capital. In total, nine records are considered about a large birthmark, about various reasons for its appearance. What unites the stories is that, in the concept of the people, the appearance of a large birthmark in a person is associated with some kind of great stress.