The white pulp extruded from the bag on the face may be the sebaceous fluid in the ductal openings of the sebaceous glands, and some of these sebaceous fluids are concentrated or partially concentrated, accompanied by varying degrees of inflammation, appearing like a plasma reaction. Therefore, in this case, patients are advised not to squeeze hard, because squeezing may lead to the spread of infection at the site of squeezing. In addition to the plasma, there may also be Propionibacterium acnes infection in the bag, which may lead to aggravation of the inflammation after squeezing, so it is important to pay attention to it as much as possible.