It is best not to eat crabs when you have a cold or cough, because coughs caused by colds are usually related to colds, or viral infections, excessive dampness and heat in the body, and excessive cold and dampness. A reasonable diet should be light, not to eat high calorie, high protein and cold, hard food. Crab is a cold food, for cough patients to eat crab can aggravate the symptoms of cough or not conducive to the improvement of cold. Since coughing is an upward trend of the lung qi, which can easily lead to indigestion, eating crabs can cause diarrhea, abdominal distension, regurgitation and vomiting. Colds are upper respiratory tract infections, due to sore throat, congestion, edema, often combined with fever, you need to drink more water to ensure adequate hydration. When a person’s resistance drops during a cold, allergies are likely to occur when resistance drops, so try not to eat seafood.