What foods are likely to cause “internal heat”?

Generally, consuming foods such as chili peppers, lamb, durian, longan, and roasted peanuts—or taking herbal medicines including ginseng, deer antler velvet, cinnamon bark (Rou Gui), Aconiti Radix Praeparata (Fu Zi), and Epimedium (Yin Yang Huo)—may predispose individuals to “excess heat” (a traditional Chinese medicine concept referring to inflammatory or hyperactive physiological states).

I. Foods

1. Chili Peppers

Chili peppers possess a pungent taste and contain capsaicin, which irritates the mucous membranes of the mouth and gastrointestinal tract, accelerates systemic blood circulation, and leads to excessive internal yang qi—thereby triggering “excess heat.” Symptoms may include sore throat, oral ulcers, and gingival swelling or pain.

2. Lamb

Lamb is classified as a warm-thermal food in traditional Chinese medicine (TCM). Excessive consumption increases internal body heat, disrupting the balance between yin and yang and resulting in “excess heat.” Common manifestations include dry mouth and throat, halitosis, and constipation.

3. Durian

Durian is a tropical fruit with high caloric content and warm-thermal nature. Its abundant sugar and calorie content can cause accumulation of heat and sugar within the body, leading to “excess heat.” Overconsumption may result in acne, sore throat, and other related symptoms.

4. Longan

Longan is a nourishing fruit with a sweet taste and warm nature. It tonifies the heart and spleen and nourishes blood to calm the spirit. However, excessive intake may generate “deficient fire,” manifesting as oral or lingual ulcers and epistaxis. Individuals with yin-deficiency constitutions are especially prone to “excess heat” following longan consumption.

5. Roasted Peanuts

Peanuts naturally contain substantial oil; roasting intensifies their drying and heating properties. After ingestion, the oils generate excess internal heat, potentially causing accumulation of heat in the spleen and stomach, leading to symptoms such as indigestion and constipation.

II. Medicinal Herbs

1. Ginseng

Ginseng is a highly valued TCM herb renowned for its ability to strongly replenish vital qi. However, being warm in nature, prolonged or excessive use may cause overabundance of yang qi and consequent “excess heat,” presenting as irritability, insomnia, and dry mouth.

2. Deer Antler Velvet

Deer antler velvet is a potent kidney-yang tonic. When used without clear indications of yang deficiency—or at excessive dosages—it may readily induce “excess heat,” manifesting as dizziness, red eyes, and irritability.

3. Cinnamon Bark (Rou Gui)

Cinnamon bark is a commonly used interior-warming herb that reinforces fire and assists yang. In individuals with inherently heat-prone constitutions, its warming effect may exacerbate internal heat pathogens, thereby precipitating “excess heat.”

4. Aconiti Radix Praeparata (Fu Zi)

Fu Zi is toxic and strongly heating. Improper processing or inappropriate usage—including excessive dosage or failure to adhere to syndrome differentiation principles—can easily trigger “excess heat.”

5. Epimedium (Yin Yang Huo)

Epimedium is a kidney-tonifying, yang-invigorating herb with a warm nature. When administered to individuals without kidney-yang deficiency—or at doses exceeding recommended levels—it may provoke “excess heat,” potentially resulting in symptoms such as tidal fever and night sweats due to ascending deficient fire.

It is advisable to maintain a light, bland diet in daily life and avoid spicy, stimulating foods. Medications should be taken strictly under professional medical guidance; self-medication is discouraged. Cultivating healthy lifestyle habits—including avoiding overexertion and intense physical activity—is essential to prevent bodily discomfort.