1. Excessive drinking will lead to gastrointestinal discomfort, including dry mouth, nausea, vomiting, diarrhea and other symptoms.

2. Irritant clove oil can cause harm to teeth and oral cavity, leading to yellowing of teeth, dental caries and other problems.

3. Long-term drinking will increase the burden on liver and kidney, especially for people with liver diseases and kidney diseases.

4. Pregnant women, lactating women and children should avoid drinking clove tea, because its ingredients may have adverse effects on fetuses and young children.

5. Excessive drinking will lead to nervous system excitement and activate adrenaline secretion, which will lead to headache, anxiety, insomnia and other problems.

Therefore, it is suggested to consult a doctor or a Chinese pharmacist before drinking clove tea, so as to understand its applicable population, drinking methods and precautions to avoid adverse side effects.