It is impossible for someone to swallow their tongue. While a seizure causes a loss of muscular control, there is tissue in your mouth behind your tongue that keeps it in place. Even if you could somehow swallow your tongue, the only thing that would happen is that food would block your airway. However, it is possible to accidentally swallow your tongue. This often happens when you are asleep and don't realize it until morning. When this does happen, immediately call your doctor or go to emergency room to have it removed. Swallowing your tongue is not likely to be dangerous if you are not allergic to penicillin or have an infection that needs treatment with antibiotics. If you do have any other health conditions, such as high blood pressure, diabetes, or heart disease, please talk with your doctor before trying this method. Also, please remember that this method should never be used as a way to stop a nosebleed or avoid surgery. These activities should not be done without medical advice.