1, the head of crayfish is not recommended.

2. The head of crayfish contains a large number of pathogenic bacteria and parasites. After eating it, it is very likely that these microorganisms will enter the human body, thus endangering human health and may get infectious diseases.

3. Although the content of protein in shrimp head is very rich, it is also a strong allergenic substance. Eating shrimp heads can easily lead to the aggravation of allergic symptoms, leading to systemic erythema, papules and itching, and in severe cases, dyspnea, edema and abdominal pain may occur.