Don't worry, young man, let me explain it to you. First of all, it must be said that this phenomenon of yours is definitely not caused by improper operation of the barber shop staff. I can tell you responsibly that this is called "nervous alopecia", commonly known as ghost shaving in our folk, which is a kind of localized alopecia areata that suddenly occurs in the head. Attention! It was sudden. Baldness is often round or oval, and often falls off unconsciously in a short time. It mostly happens when you sleep at night, so it's called ghost shaving! More common in children and young people with exuberant sebum secretion. Neuropathic alopecia can be divided into five categories: alopecia areata, alopecia totalis, alopecia universalis, postpartum alopecia and hemorrhagic alopecia. You are alopecia areata. Does that sound terrible? Haha, but don't worry, I am very responsible to tell you that your hair will definitely grow back. Don't listen to people's advice to put something on it, and you don't need to take medicine. Usually you will find new hair in a month or two. Also, it is essential to ensure adequate sleep at ordinary times. Try to ensure the quality of sleep and adjust the blood circulation in the cerebral cortex in time! Adjust the diet structure reasonably, usually eat more fresh fruits and vegetables, and eat less greasy, sweet and spicy food. According to what I said, I believe you will get better faster.