Those who are allergic to lobster can experience a number of symptoms, including gas. Most food allergies are triggered by proteins which are found in certain foods, including fish, eggs, peanuts, tree nuts, and shellfish like shrimp, crab, and of course lobster. In children the list of foods that trigger an allergic reaction is a bit shorter and includes wheat as well as milk and nuts.
Those who experience severe gas, stomach cramping, or diarrhea after eating lobster or any other type of food for that matter will want to avoid it completely. Although food poisoning from lobster can certainly happen, especially if the lobster was dead before being cooked, an allergic reaction is more common.