Bronchial dilatation is not recommended to eat crab, crab is a seafood food, attribute cold, eat too much may cause gastrointestinal discomfort, nausea, vomiting, abdominal pain, diarrhea and other symptoms. Moreover, crab belongs to seafood food, some people may have allergic symptoms after consumption, causing airway hyperreactivity, coughing, coughing phlegm, wheezing symptoms of aggravation. The bronchiectasis itself is also a respiratory disease, if the allergy will lead to further aggravation of bronchiectasis symptoms, so for bronchiectasis patients is best not to eat crab, it is recommended to eat a light diet, avoid spicy stimulating food.