1. Gastrointestinal discomfort: long-term consumption of excessive ginkgo biloba tea can lead to gastrointestinal discomfort, resulting in nausea, vomiting, diarrhea and other symptoms.

2. Allergic reaction: a very small number of people may be allergic to ginkgo biloba tea, symptoms of allergic reaction, such as itching, redness and swelling of the skin, respiratory difficulties, etc., need to stop drinking immediately.

3. Coagulation: Ginkgo biloba contains active ingredients that inhibit the production of thrombin, and some people may be allergic to the ingredients in ginkgo biloba, leading to a decline in coagulation, causing bleeding and other health problems.

4. Long-term consumption will affect vision: excessive consumption of ginkgo biloba tea will make people's eyes dry, fatigue, blurred vision.

5. Not good for pregnant women and children: Pregnant women and children should be careful with ginkgo biloba tea, excessive use may affect the health of the fetus and children.