Duck neck is a very popular food at present. Eating duck neck is harmful to human body. Ducks enter the body through the neck when eating, including a large number of lymph nodes, which is one of the immune defense mechanisms of the body. Lymphocytes will devour bacteria and stay in the neck, which is easy to harm human health after being absorbed by the human body. Duck neck is usually the place for vaccination. Duck neck contains a lot of hormones, which will stimulate the human body after eating.