Does steeping dried tangerine peel in water cause internal heat?
Generally, drinking aged tangerine peel (chenpi) infused water does not cause heatiness (excessive internal heat according to traditional Chinese medicine), but excessive consumption should be avoided. Detailed explanation is as follows:

As a traditional Chinese herb, chenpi has a pungent and bitter taste and is warm in nature, entering the spleen and lung meridians. Drinking a moderate amount of chenpi-infused water, especially when consumed in moderation and not over a prolonged period, generally does not cause heatiness. Its primary effects include regulating spleen and stomach functions, promoting digestion, and helping to relieve gastrointestinal discomfort. Additionally, chenpi can help regulate qi, strengthen the spleen, resolve dampness, transform phlegm, and assist in treating conditions such as qi stagnation in the spleen and stomach, vomiting, and hiccups.
However, excessive consumption of chenpi water, or long-term intake of highly concentrated chenpi infusion, may lead to symptoms resembling heatiness such as dry mouth and sore throat, particularly in individuals with a naturally heat-prone constitution. It may also cause dysfunction of the spleen and stomach, potentially leading to abdominal pain and diarrhea. Therefore, it is recommended to consume chenpi water in moderation as part of a regular diet.
When drinking chenpi water, it is important to choose high-quality chenpi and avoid using moldy or spoiled peel, to prevent any adverse effects on health.