In the traditional sense, bleeding gums are seen as a sign of 'internal heat' but in reality, what you should do is get a dental cleaning. The first time I got my teeth cleaned was during grad school at the university hospital in Hong Kong, and it was almost free. That doctor looked so exhausted Recently, I’ve been following a strategy set by GPT: brushing my teeth every morning and night, and at night using a combo of water flosser + toothbrush + mouthwash in that order. Instantly perfect results. Maybe friends who are troubled by bleeding gums can give it a try, but still, follow your doctor’s advice. HKU’s dental school seems to be world-class, but dentists in Hong Kong are also quite expensive. It feels like after 2015, dental cleaning suddenly became crazily popular in mainland China, with some places offering it for as little as a few dozen RMB. Even the buses in Hong Kong are covered with ads for Shenzhen dental clinics.