According to the records of traditional Chinese medicine and folklore, it refers to the products that wind produces phlegm, sends poison to help fire, and evil spirits easily induce old diseases and add new diseases. The scope of "hair" is wider, and some even expand. The so-called "hair products" are summarized according to folk customs and some documents such as "Xisheng". Common hair products include pig's head, chicken, eggs, donkey meat, roe, beef and mutton, dog meat, goose, goose eggs, duck eggs, pheasants and other meats. There are carp, silver carp, squat fish, silver carp, white fish, yellow croaker, cuttlefish, pomfret, shad, perch, sturgeon, shad, octopus, flounder, minnows, hairtail, bighead carp, eel and so on. There are Chinese toon head, radish, coriander, mustard, spinach, bean sprouts, lettuce, eggplant, water bamboo, leek, bamboo shoots, pumpkin, arrowhead, mushrooms and other vegetables; There are apricot, plum, peach, ginkgo, mango, bayberry, cherry, litchi, melon and other fruits; There are spicy and pungent seasoning foods such as onion, pepper, ginger and garlic; There are also vegetable oil, distiller's grains, liquor, peas, soybeans, tofu, tofu, silkworm chrysalis and so on. Sometimes, meat, smell, smell and all other foods are regarded as hair products, especially suitable for skin patients with sores, swelling, chronic eczema and dermatitis and allergic diseases.

There are three possibilities that hair can lead to the recurrence or aggravation of old diseases: 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 cause intractable skin diseases such as urticaria, eczema, neurodermatitis, impetigo and psoriasis in people with skin allergies. 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.

Chinese medicine attaches great importance to diet and often warns patients that "hair can't be eaten". During the treatment, many patients often ask, "What should I eat for this disease? Do you want to avoid eating? " Many drugs can not only provide all kinds of nutrition needed by human beings, but also provide health care, rehabilitation and treatment. At the same time, for some people, some foods will also reduce the efficacy of drugs, affect the recovery of the body, and even lead to diseases. Therefore, for those foods that are not conducive to treatment, they are often commonly called "hair". Hair loss in a broad sense refers to a kind of food that causes a certain disease, stimulates a new disease, or hinders treatment, aggravates the condition and affects recovery in the process of taking medicine and conditioning after illness. Generally speaking, it is a spicy, pungent, greasy, fishy and seafood food. Because hair is not conducive to the treatment of diseases and the recovery of the body, it is necessary to avoid eating during illness. The pathogenic characteristics of hair generally include fever, sores, excessive internal heat, wind, phlegm, flatulence, constipation, diarrhea and induced chronic diseases. Including some manifestations of food allergy in allergic diseases, such as allergic purpura, dermatitis, eczema, enteritis, urticaria and so on. Under what circumstances should I avoid eating? When food affects the treatment of diseases, it should be avoided when it helps the evil and hurts the right and increases the disease and benefits the disease. Such as urticaria, erysipelas, eczema, furuncle, stroke, dizziness and other symptoms, do not eat seafood fish, shrimp, crab, shellfish, pig head, chicken, goose, eggs and so on. Another example is various hemorrhagic diseases: metrorrhagia and leukorrhagia, menorrhagia, hematemesis, hemoptysis, nosebleeds, subcutaneous bleeding, hematuria, hemorrhoids and other diseases. Pepper, mutton, dog meat and soju are not edible. For example, ulcers, chronic gastritis, indigestion and other diseases are not suitable for eating white wine, beans and potatoes. Avoid foods that are prone to adverse reactions with drugs. When the effect of eating food is consistent with that of drugs, it will weaken and offset the curative effect of drugs, and even produce toxic and side effects, thus hindering the treatment of diseases. For example, "Compendium of Materia Medica" records: "Anyone who takes medicine should not eat pig or dog meat, greasy soup or smelly things. It is not unreasonable to eat more raw garlic, coriander, ginger, fruit and slippery things when taking medicine. For example, eat Rhizoma Coptidis, Radix Glycyrrhizae, Fructus Xanthii, Mume Fructus, withered stems, etc. Pork is forbidden, turtle shell is forbidden to eat amaranth, and Rehmannia glutinosa and Polygonum multiflorum are forbidden to eat onions, garlic and radishes. This is the focus of Chinese medicine.

Avoid foods that are not conducive to adjustment and rehabilitation after illness. Early recovery from a serious illness, indigestion, lack of healthy qi and improper diet may all lead to relapse or other diseases. Such as fish, shrimp, crabs, shellfish, Chinese toon buds, mushrooms, and some poultry and eggs, people with allergic diseases should pay attention to avoid eating them. Another example is hyperlipidemia, hypertension, coronary heart disease, stroke and so on. Diet should be light after illness, and you should not overeat greasy and thick food.