Crabs and tomatoes can generally be eaten together, will not produce any toxic reaction but should be eaten in moderation, allergic to crabs are prohibited. Crab is rich in animal protein, calcium, iron, zinc and other nutrients needed by the body, has a certain nutritional value, can provide some energy for the body, replenish some of the nutrients needed, to a certain extent, to maintain normal life activities. Those who are allergic to crabs should avoid consuming them so as not to affect the body. Tomato is a relatively common vegetable, which is rich in lycopene, carotene, vitamin C, vitamin a and other nutrients needed by the organism. It can help the body to replenish some of the nutrients it needs. Some of the nutrients inside the crab and tomato, between the two eating together will not produce toxic substances, generally can be eaten together, but pay attention to moderation, to avoid leading to bloating and other discomforts.