Properly preserved, not spoiled shrimp can be eaten overnight, but if it has been spoiled can not be consumed. Shrimp contains more nutrients, per 100 grams of shrimp containing 93 calories, protein 18.6 grams, 0.8 grams of fat, 2.8 grams of carbohydrates, cholesterol 193 milligrams, 62 milligrams of calcium, so it is widely loved, as a health food, often appear on the table. It is best to consume shrimp fresh and not keep them overnight, as this will maximize the retention of nutrients in the shrimp that are not damaged over time. If it is to be kept overnight, it is recommended to place it in the refrigerator to avoid corruption and the production of harmful bacteria such as Escherichia coli. At the same time, the process of rotting shrimp will produce a large number of histamine, which can easily lead to food poisoning, abdominal pain, nausea, vomiting and so on after consumption. People who are allergic to shrimp are not suitable for shrimp.