The side effects and hazards of tomato leaves include increased gastrointestinal burden and allergic reactions. 1. Increase the burden on the gastrointestinal tract: tomato leaves for the tomato leaves, which are rich in dietary fiber, after consumption can promote gastrointestinal peristalsis, accelerate the excretion of body wastes, in general for the human body will not produce side effects and harm. However, consuming too much tomato leaves may increase the burden on the gastrointestinal tract, causing abdominal pain, diarrhea and other symptoms; 2. cause allergic reactions: some people are allergic to the phenomenon of tomato leaves, after consumption of itchy skin, rashes and other adverse reactions, although the proportion of small, but some people have appeared, so for the allergic population, the consumption of tomato leaves should pay more attention to, such as the occurrence of any discomfort, it is recommended to seek medical attention.