Published: February 15, 2020 Updated: November 23, 2022 Last year physician Eugene Gu tweeted that pain associated with circumcision causes some babies to go into "mental shock." There is no support for such a diagnosis, and Gu's controversial background makes it reckless that anyone would cite him as a medical authority. Shock is a critical medical condition that is brought about by a sudden drop in blood flow throughout the body. The circulatory system fails to maintain ad