Usually shrimp and watermelon can be eaten together, but should pay attention to the combination of personal constitution in moderation. People with hot constitution, shrimp and watermelon together in moderation generally have no effect; but people with cold constitution, after eating shrimp and watermelon together, may lead to diarrhea, abdominal pain and other uncomfortable symptoms, then you need to minimize the amount of food. From the perspective of Chinese medicine, some Chinese doctors believe that shrimp and watermelon are cold food, should not be eaten together in large quantities, especially the existence of diarrhea, weakness, fatigue, cold stomach, cold hands and feet and other symptoms of the population, while eating shrimp and watermelon may aggravate these uncomfortable symptoms. However, it should be noted that shrimp is misrepresented to contain pentavalent arsenic compounds, while watermelon contains vitamin C. The two will react to produce trivalent arsenic compounds (arsenic), which can be harmful to human health. But whether it is pentavalent arsenic compounds or vitamin C, the likelihood of a reaction in the body to produce arsenic is extremely low. The human body’s digestion and absorption, metabolism is a complex process, there is a lack of evidence that shrimp and watermelon together lead to arsenic poisoning. In addition, even for people with a normal constitution, eating shrimp and watermelon together for a long time and in large quantities, or with other cold foods, such as cold drinks and ice cream, may lead to the formation of a cold constitution. Therefore shrimp and watermelon can be eaten together, but need to clarify their own body conditions, pay attention to control the amount of food.