The crab is also called crab, and there are no ten clinical contraindications to eating crab, but the crab itself is cold in nature and has more nutrients, so some people cannot eat large amounts of crab, or eat crab for a long time, otherwise it may harm their health. 1. Allergic people should eat carefully: for allergic people, eating too much crab at one time may cause allergic symptoms, such as nausea, vomiting, fever, etc. It is recommended that people eat crab in moderation according to their own constitution to avoid causing allergic symptoms, but people who are allergic to crab should be prohibited from eating crab; 3. People with high blood pressure, coronary heart disease and arteriosclerosis should eat carefully: crab is rich in sodium ions, and if too much food containing sodium ions is consumed at one time, it may If you eat too much food containing sodium ions at one time, it may raise your blood pressure, which is not good for blood pressure control. In addition, crab has a high cholesterol content, which can aggravate the disease in patients with hypertension causing atherosclerosis and coronary heart disease. It is recommended that people with hypertension, coronary heart disease and atherosclerosis consume crab in moderation according to their needs, to avoid consuming too much and causing discomfort; 4, pregnant women should eat carefully: crab contains high cholesterol content, if pregnant women consume too much, it may cause gestational hypertension and other diseases, it is recommended that pregnant women eat less or even do not eat crab; 5, caution and cold food together: from the Chinese medicine, crab is cold, so it is not recommended that crab and cold food If you eat crab with cold food, such as persimmon, eggplant, melon, ice cream, etc., it may hurt your spleen and stomach and cause diarrhea if you eat it with poor stomach or body resistance. In addition, crabs like to eat animal carcasses, and there are often a lot of bacteria in their gut and gills, so it is recommended that when eating crabs, try to eat fresh, clean and cooked crabs to avoid adverse consequences.