Carp is a kind of freshwater fish, which is a kind of hairy food from Chinese medicine point of view. The main thing is that the food is too high in nutrients or contains some irritating substances that may trigger or aggravate allergies and other diseases, or cause the recurrence or aggravation of existing diseases. For example, many seafoods contain histamine, which may increase capillary permeability and cause skin congestion and edema, and even cause body metamorphosis, also known as the formation of allergy. But crucian carp is a freshwater fish, compared to some seafood such as fish, shrimp, crab, etc., the nature is more mild, usually a small amount of consumption does not lead to the body discomfort symptoms. It is also a high protein but high quality fat food, which is one of the ingredients that can be chosen by people who have digestive system diseases, or weak gastrointestinal function, or have the need to lose weight. In addition, crucian carp soup has a lactation and lactation effect, and can be consumed by women who have poor lactation. However, some people are not suitable to eat crucian carp, such as those who are allergic to seafood or simply allergic to crucian carp, and although crucian carp is relatively calm in nature, it is generally not suitable to eat crucian carp during the acute period of 1-2 days after vaccination or major traumatic surgery, as a hair product may affect the organism. In addition, the purine content in carp is relatively high, so it is recommended to reduce or avoid carp for people who need to limit purine intake such as hyperuricemia and gout.