In a Nutshell: Imagine your body has an internal thermostat. In Chinese culture, things like stress, lack of sleep, or eating too much fried and spicy food can turn this thermostat way up, creating a state of “internal fire” or “heatiness” called
上火 (shàng huǒ). This can lead to symptoms like a sore throat, canker sores, acne, or a dry mouth.
降火 (jiàng huǒ) is the action you take to turn that thermostat back down. It means “to lower the fire” and involves consuming “cooling” foods and drinks to restore your body's natural balance.