Fish is a hairy food, and a hairy food is usually a food that is susceptible to disease due to the presence of some substances. Fish contains a variety of nutrients, but it is considered a hairy food and is prone to discomfort when consumed in a weakened condition, so it should be consumed according to individual circumstances. In Chinese medicine, fish is considered to be a hairy food, so it should be avoided for patients with respiratory diseases such as gout and asthma. In addition, fish contains histamine, some people will eat due to histamine action caused by increased vascular permeability, triggering allergic reactions, so people suffering from skin diseases should try to avoid eating, so as not to aggravate the original symptoms or induce urticaria, eczema, aggravate skin itching, rashes and other symptoms of performance. However, for some people, fish is rich in high-quality protein, amino acids and vitamins, as well as calcium, iron, phosphorus and other minerals, which are easily digested and absorbed by the organism and can supplement nutrition and help maintain cardiovascular health. Therefore, fish can be eaten in moderation in general, but if you feel unwell or are in the midst of a disease, it is not recommended to eat fish to avoid aggravating adverse reactions.