During puberty, due to the increase in oestrogen and testosterone, the gums tend to respond more to the stimulation of plaque present on the tooth surface and tend to bleed when brushing. This, coupled with the generally poor oral hygiene habits of adolescents at this stage, makes it easier to cause the retention of plaque and aggravate gum inflammation. Therefore, for adolescents with bleeding brushing, good oral hygiene habits should be established and reinforced, and gum inflammation should be checked and treated if necessary.