Lettuce+cheese: cheese is oily food, and lettuce is cold. Eating together can easily lead to indigestion or abdominal pain and diarrhea. At the same time, lettuce is easy to be contaminated by parasites when eaten raw, such as hookworms and roundworms, which is not good for health.

Lettuce+honey: bad for the stomach and easy to cause diarrhea.

Lettuce+Asarum: Asarum is warm and divergent. The function and taste of the two are not consistent, so people who treat diseases with asarum prescription should not eat lettuce, otherwise the curative effect will be reduced.