”The autumn breeze rises, the crab is fat”. In fact, crab is not only delicious, but also nutritious, a high-quality, high-protein tonic, which is very beneficial to nourish the body. However, many tumor patients do not dare to enjoy this delicious food because they do not know about crabs, which is a pity. The crab has been recorded in many ancient Chinese medical texts, such as “Shen Nong Ben Cao Jing”: “Crab, salty and cold in taste, main chest evil heat knot pain.” The “Ben Jing Feng Yuan” says: “Crab, sex specializes in breaking blood, so it can renew the broken tendons.” The famous doctor says: “Dispersing blood, nourishing tendons and benefiting qi.” The “Materia Medica Collection” believes that “its function is not only to disperse, but also to harmonize the blood.” According to Chinese medicine, crab is cold, salty and enters the liver and stomach meridians, with the effect of clearing heat and detoxifying, nourishing bones and marrow, nourishing tendons and invigorating blood, opening the meridians, benefiting limbs and joints, renewing injuries, nourishing liver yin and filling the stomach. Among them, crab meat has the functions of clearing all kinds of heat, dispersing blood knots, renewing injuries, regulating the meridians and nourishing Yin and blood; crab shell is more effective in clearing heat and detoxifying, breaking stasis and eliminating accumulation. Crab shell is a good medicine to treat breast lumps, and it is recorded in “Medical Record” and “Ulterior Medicine”: “Crab shells for breast lumps: dozens of raw crab shells, put them in a casserole and roast them as a powder, two coins per serving, mixed with good wine, must be taken day by day, without interruption, and can be stopped by elimination.” Modern medicine considers “breast rock” to be a solid lump in the breast, including breast cancer. Based on the fact that cancer toxicity is the key to the development of breast cancer, cancer toxicity stagnates and the lesion becomes perverse, inducing phlegm and heat toxicity and other pathological factors, and depleting qi and yin. Therefore, the treatment of tumor should be based on the method of clearing heat and detoxification throughout the early, middle and late stages of tumor, and the crab’s effect of clearing heat and detoxification is the basis of its anti-cancer. The crab’s ability to clear heat and detoxify the body is the basis of its anti-cancer effect. In recent years, it has been discovered that crab shells have anti-cancer effects. For example, Japanese scientists have proven that crab shells are rich in chitin, also known as chitin, shell polysaccharide, the English name: Chitin, the chemical name: polyacetylglucosamine. The anti-tumor effect of chitin is manifested in three aspects: 1. Cancer cells release cancer toxin, which reduces iron in serum and causes iron deficiency anemia; cancer toxin acts on the satiety center to make patients lose appetite, accelerate lipolysis and protein decomposition and become emaciated, and even cachexia. In contrast, tributyrin can enhance the immunity of the body and inhibit the secretion of toxins by cancer cells, thus suppressing tumors. In this acidic environment, lymphocytes, which maintain the immune function of human body, are unresponsive and immune function decreases, and cancer cells proliferate rapidly. In this acidic environment, the lymphocytes which maintain the immune function of human body are unresponsive and the immune function decreases, and cancer cells proliferate rapidly. 3. Chitin can be adsorbed on the inner wall of blood vessels to prevent cancer cells metastasized through blood from touching and attaching to the walls of the tubes flowing through blood vessels, thus playing the role of preventing cancer cells from metastasizing and growing. Crab is a kind of anti-cancer food with both medical and food benefits, but crab meat is cold in nature and should not be eaten in excess. Those who have cold spleen and stomach should pay special attention to avoid abdominal pain and diarrhea, and can be dipped in ginger vinegar sauce to remove its coldness. Patients suffering from fever, stomach pain and diarrhea eating crab will aggravate the condition; chronic gastritis, duodenal ulcer, cholecystitis, gallstone disease, hepatitis active people, it is best not to eat crab, so as not to aggravate the condition; crab yellow has a high cholesterol content, suffering from coronary heart disease, hypertension, arteriosclerosis, hyperlipidemia should eat less or not, otherwise it will aggravate the condition; crab is a high protein food, can cause xenoprotein Allergies, commonly known as its “hair”, so people who have allergies to shrimp, seafood, etc. should also not eat crab. Those with allergies such as inflammatory skin, prone to asthma, allergic rhinitis, and those suffering from eczema, ringworm and other skin therapy diseases should eat crab with caution.