Because seafood contains a histamine that can cause allergies, especially when seafood is not fresh, the amount of histamine will increase. In the past, the transportation and storage conditions were very backward, and seafood was easy to be fresh, so people's fear of "Mao" was more prominent.

Hair refers to foods that are nutritious or irritating, and are particularly prone to induce certain diseases (especially old diseases) or aggravate existing diseases. Hair taboo is of great significance in diet and dietotherapy.

Under normal circumstances, food is also food, and moderate consumption will not cause side effects or discomfort to most people, but will only induce diseases related to certain special constitutions.

Extended data:

The reason why hair can lead to relapse or aggravate the disease is that some scholars have concluded that there are three possibilities:

First, these animal foods contain some hormones, which will promote some hyperfunctions or metabolic disorders of the human body. For example, when glucocorticoid exceeds the physiological dose, it can induce infection spread, ulcer bleeding, epilepsy and so on. , and cause relapse.

Second, the foreign protein contained in some foods becomes allergens, causing the recurrence of allergic diseases. Such as marine fish, shrimps and crabs, often make people with skin allergies suffer from intractable skin diseases such as urticaria, eczema, neurodermatitis and impetigo. Tofu sometimes causes asthma to recur.

Third, some irritating foods, such as alcohol, onions, garlic, etc., are easy to cause inflammation to spread and boils turn yellow. This is why Chinese medicine says that heat syndrome should not eat spicy and irritating hair.

References:

Baidu encyclopedia-hair thing