Of course you can eat it, crab is a cold food. For patients with constipation, eating crab in moderation will instead relieve the symptoms of constipation. But be careful not to eat too much, otherwise it will aggravate the symptoms of constipation. Therefore, constipation can eat crab, but to eat in moderation, not greedy. There are many reasons for constipation, excluding gastrointestinal diseases, diet, lifestyle habits, mental aspects and many other factors can lead to constipation. For constipation patients in the diet need to pay attention to conditioning, not overeating, to develop healthy eating habits, eat less or do not eat greasy and spicy food to stimulate the stomach, can eat more crude fiber content of food such as corn, vegetables and fruits. Usually also pay attention to more exercise, do not sit still. You can choose jogging, walking and other ways to exercise, promote gastrointestinal peristalsis, relieve constipation.