Does black tea cause internal heat?

Mar 20, 2025 Source: Cainiu Health
Disease description:

I am a 29-year-old female. Recently, I have been experiencing symptoms of dry mouth, sore throat, and constipation, which I believe are caused by excessive internal heat (so-called "fire"). I usually enjoy drinking black tea, but I wonder if consuming black tea might worsen these symptoms of internal heat?

Doctor's answer (1)
Dr. Zhang Xiuhong

Black tea may exacerbate symptoms of excessive internal heat. As a fermented tea, black tea is relatively warming in nature and contains high levels of caffeine and tannic acid. Caffeine has a diuretic effect, which may lead to dehydration and further worsen symptoms such as dry mouth and throat. Tannic acid may irritate the gastric mucosa, causing gastrointestinal discomfort. Additionally, the warming nature of black tea can increase internal body heat, thereby aggravating symptoms of excessive heat, such as dry mouth and throat, sore throat, and constipation. Therefore, it is advisable to avoid drinking black tea during episodes of excessive internal heat.

During such periods, the following measures can help alleviate symptoms and maintain overall health. Drink plenty of water or warm water to stay adequately hydrated, which can help relieve dry mouth and throat as well as constipation. Choose light, easily digestible foods, such as fresh vegetables and fruits, and avoid spicy, greasy, and fried foods, which may worsen symptoms. Opt for cooling beverages such as chrysanthemum tea, green tea, or mung bean soup to help reduce internal heat. Additionally, maintain regular sleep patterns, ensure sufficient rest, and minimize mental stress to help regulate bodily functions. If symptoms persist or are accompanied by severe complications, seek medical attention promptly.