Why do I feel dizzy and have a racing heart after drinking tea?

Generally, dizziness and palpitations caused by drinking tea may be due to reasons such as high tea concentration, drinking tea on an empty stomach, tea polyphenol allergy, iron deficiency anemia, arrhythmia, etc. Symptomatic treatment such as general treatment or medication may be needed. If discomfort occurs, seek medical examination and treatment at a hospital as soon as possible. Detailed explanations are as follows:

1. High Tea Concentration

When drinking strong tea, the high concentration of caffeine in the tea may cause increased heart rate, reduced cardiac output, leading to insufficient cerebral blood supply, which can cause dizziness and palpitations, possibly accompanied by insomnia, irritability, and gastrointestinal discomfort. It is recommended to avoid drinking strong tea in daily life and choose lighter tea beverages.

2. Drinking Tea on an Empty Stomach

When fasting, the body's blood glucose levels are low, and ingredients in tea may promote glucose consumption or affect glucose absorption, leading to symptoms of hypoglycemia, which may be accompanied by sweating, hunger, hand tremors, and other symptoms. It is recommended to ensure food intake before drinking tea to avoid drinking tea on an empty stomach.

3. Tea Polyphenol Allergy

Tea polyphenols are major components of tea. Some individuals may be allergic to tea polyphenols. After consuming tea, allergic reactions might occur, including symptoms such as dizziness and palpitations, possibly accompanied by skin itching, rashes, difficulty breathing, and other symptoms. It is recommended to use medications such as Cetirizine Hydrochloride Tablets, Loratadine Tablets, or Promethazine Hydrochloride Tablets under a doctor's guidance for treatment.

4. Iron Deficiency Anemia

Long-term selective or picky eating may lead to iron deficiency anemia. Tannic acid in tea combines with iron ions, affecting iron absorption. If there is already an iron deficiency, drinking tea may worsen the deficiency, further reducing oxygen transport capacity, causing dizziness and palpitations, and possibly accompanied by pale complexion, fatigue, shortness of breath, and other symptoms. It is recommended to follow medical advice to use medications such as Compound Ferrous Sulfate Granules, Iron Dextran Tablets, or Iron Sucrose Injection to alleviate symptoms.

5. Arrhythmia

Arrhythmia may be caused by abnormal cardiac electrical signal conduction or structural abnormalities of the heart. After drinking tea, ingredients like caffeine may stimulate the heart's electrical conduction system, thereby worsening arrhythmia symptoms, which may be accompanied by chest pain, difficulty breathing, leg swelling, and other symptoms. It is recommended to use medications such as Quinidine Sulfate Tablets, Procainamide Hydrochloride Tablets, or Verapamil Hydrochloride Tablets under medical guidance to relieve discomfort symptoms.

It is recommended to pay attention to individual tolerance to tea in daily life, control the amount and concentration of tea consumed, and avoid drinking tea on an empty stomach as much as possible to reduce irritation to the body.