Why does drinking traditional Chinese medicine cause bloating?
Nov 24, 2022
Source: Cainiu Health
Dr. Shen Yonghua
Introduction
Abdominal bloating after taking traditional Chinese medicine is generally associated with factors such as the cold nature of the herbs, taking medication immediately after meals, pre-existing gastrointestinal problems, or improper diet. There are various reasons for bloating following the intake of Chinese herbal medicine. If symptoms persist for a prolonged period without improvement, patients are advised to seek prompt medical attention at a hospital to avoid delaying treatment and prevent unforeseen complications.
Bloating after taking traditional Chinese medicine (TCM) is generally associated with factors such as the cold nature of the herbs, taking medication immediately after meals, pre-existing gastrointestinal problems, and improper diet.
1. Cold Nature of Herbs
Certain TCM herbs have a cold or cooling property. Commonly used examples in clinical practice include Wild Chrysanthemum (Ye Ju Hua), Andrographis (Chuan Xin Lian), and Isatis Leaf (Da Qing Ye), which are primarily prescribed to relieve symptoms caused by heat-related conditions, such as high fever, cough, and excessive phlegm. In some patients, the cold nature of these herbs may irritate the gastrointestinal tract, increasing intestinal motility and leading to bloating. This may be accompanied by other symptoms such as increased bowel sounds and abdominal pain. For such cases, it is usually recommended to temporarily discontinue the medication under medical guidance until the digestive system adapts, then resume treatment as directed.
2. Taking Medication Immediately After Meals
Taking TCM right after eating may also cause bloating. After a meal, food remains in the stomach and has not yet been fully digested and absorbed; the stomach is already full. Adding herbal medicine at this time may further increase the sense of fullness, resulting in bloating. To alleviate symptoms, patients may follow medical advice to use abdominal massage—gently rubbing around the navel in a clockwise direction followed by counterclockwise motions—to help stimulate gastrointestinal motility and reduce bloating.
3. Pre-existing Gastrointestinal Weakness
Patients with poor constitution and weak digestive systems may struggle to digest and absorb tonic herbs such as Rehmannia glutinosa (Shu Di Huang) or Chinese Angelica (Dang Gui). This may lead to bloating. Under a doctor’s supervision, medications like Shen Ling Bai Zhu San or Mu Xiang Shun Qi Wan can be used to regulate gastrointestinal function and relieve symptoms.
4. Improper Diet
If patients consume gas-producing foods or fruits—such as sweet potatoes or soybeans—after taking TCM, adverse reactions including abdominal bloating may occur. It is advisable to pay attention to dietary habits during TCM treatment, avoiding hard-to-digest, raw, cold, or cooling foods that might interfere with the efficacy of the herbs.
There are various reasons for bloating after taking TCM. If symptoms persist without improvement, patients should seek timely medical evaluation and treatment to avoid delays in care and potential complications.
