If you are not allergic to crabs, you can consume crabs in moderation when you have a cold. However, it should not be consumed in large quantities, because large quantities of crabs may cause gastrointestinal discomfort. After suffering from a cold, some patients have a poor appetite and want to eat some delicious food, such as crabs, but patients with colds should pay attention to moderate consumption of crabs, because during colds the gastrointestinal digestion and absorption ability of the stomach and intestines are weakened, and a large amount of consumption of crabs will easily lead to gastrointestinal burden, which may cause indigestion or gastrointestinal dysfunction. When you have a cold, you should eat a light diet, and you can eat meat, eggs and dairy products to supplement the nutrients that your body needs; you should also rest more, avoid strenuous exercise and keep your body warm.