Can drinking traditional Chinese medicine cause oral ulcers?
Oct 16, 2025
Source: Cainiu Health
Dr. Liu Chao
Introduction
In general, whether taking Chinese herbal medicine can cause oral ulcers depends on the composition of the herbs and the individual's physical constitution. During the course of taking herbal medicine, one should pay attention to changes in oral health. If ulcers develop, the prescribing physician should be informed promptly to determine whether they are related to the herbal ingredients. It is also advisable to avoid spicy, fried, or other heat-inducing foods during treatment.
In general, whether taking Chinese herbal medicine can cause oral ulcers depends on the herbal ingredients and individual body constitution. The specific analysis is as follows:
If the herbal medicine taken has a warm or hot nature, and the individual has a body constitution prone to "internal heat" (excess internal fire), or if the formula contains ingredients that mildly irritate the oral mucosa, prolonged or excessive use may lead to oral ulcers. This condition is usually caused by accumulation of internal heat or local tissue damage due to mucosal irritation, often accompanied by symptoms such as dry mouth and sore throat. Symptoms typically improve gradually after discontinuing the medication or adjusting the prescription.
If the herbal medicine has a balanced, neutral nature and primarily aims to regulate the spleen and stomach or nourish yin and moisten dryness, and if the individual’s constitution matches the prescription without allergic reactions or intolerance to any components, oral ulcers are unlikely to occur. Some tonic herbal formulas can even improve bodily fluid metabolism and provide nutritional support, benefiting oral mucosal health and reducing the likelihood of ulcers—particularly suitable for individuals prone to oral ulcers when taken under medical supervision.
During treatment with Chinese herbal medicine, it is important to monitor oral health. If ulcers develop, promptly inform the prescribing physician to determine whether they are related to the herbal ingredients. Avoid consuming spicy, fried, or other heat-inducing foods that may trigger ulcers; maintain good oral hygiene by rinsing the mouth with warm water after meals; strictly follow medical advice regarding dosage and duration of treatment; and do not adjust the dose or modify the formula independently, to ensure safe medication use.
