Shaving is generally not harmful to the human body, but skin irritation, scratching and folliculitis may occur during the shaving process. First of all, in the process of shaving, the surface of the skin will be subjected to a certain amount of friction and stimulation, the skin may produce transient redness, swelling or itching, which is due to the skin stimulation after the local blood flow increases, capillary dilatation, usually does not last long. Secondly, if shaving is not done properly, it may cause scratches on the skin surface, and the skin wound may be infected, resulting in redness, swelling, pain and other symptoms. Using alcohol-containing skin care products after shaving may also irritate the wound and increase the pain of the scrape. Finally, another possible side effect of shaving is folliculitis, due to the fact that the follicular opening may become infected after shaving, resulting in redness, swelling, pain, and pustules. When shaving or shaving the armpits, the chances of folliculitis are increased because the skin in these areas is relatively hot and moist and prone to accumulating secretions such as sweat and sebum. Overall, although shaving may lead to the above conditions, as long as it is done correctly, such as using the correct use of shaving appliances, proper skin cleansing and moisturizing before and after shaving, most people can shave safely without too much concern, such as skin discomfort after shaving, you should seek medical attention for checkups in a timely manner.