Cassia seed is a traditional herbal medicine, which contains a variety of nutrients and medicinal ingredients, and has the effects of clearing away heat, improving eyesight, diuresis and relaxing bowels. Proper amount of cassia seed can improve health, but excessive or long-term use may have some side effects:

1. Gastrointestinal discomfort: Cassia seed has the function of purging heat and relaxing bowels, but long-term and large-scale use may cause certain irritation to the digestive system, resulting in symptoms such as stomach pain and diarrhea.

2. Increase the burden of liver and kidney: Excessive use of cassia seed may increase the burden of liver and kidney, leading to abnormal liver and kidney function.

3. Drug dependence: Long-term and large-scale use of cassia seed may lead to drug dependence, leading to drug dependence symptoms, such as withdrawal syndrome and emotional instability.

4. Interaction with other drugs: Cassia seed may interact with some drugs and affect the curative effect. Therefore, we should be careful not to use cassia seed with other drugs at the same time.

In a word, proper amount of cassia seed is good for health, but we must be alert to its possible side effects and avoid abuse. Please consult a doctor or Chinese medicine for specific usage and dosage.