Drinking Longjing tea generally has no obvious side effects, but if you drink too much or don't drink it, you may have the following symptoms:

1. Tea drunkenness: Excessive drinking of Longjing tea may lead to tea drunkenness, manifested as dizziness, nausea, vomiting and other symptoms.

2. Allergy: Individuals may be allergic to the ingredients in Longjing tea, leading to skin allergies, dyspnea and other symptoms.

3. Diarrhea: Excessive drinking of Longjing tea may lead to digestive problems such as diarrhea.

4. Drinking during pregnancy: Pregnant women need to pay attention to their diet, and drinking too much Longjing tea may have an impact on the fetus.

In a word, you should pay attention to the right amount of Longjing tea, not excessive or long-term drinking. If you feel unwell, you should seek medical advice promptly.