Result of atherosclerotic plaque blocking one or more of the blood vessels that supply the heart. Can cause chest pain/angina pectoris occurring due to stress of exercise. If blockage completely impedes blood flow to the heart, a heart attack can occur.
It can be caused by insect stings, food, or medicines. It's caused by the release of histamine into your bloodstream and tissues. Histamine is an immune system chemical. Tongue or throat swelling can happen along with an allergic rash (hives), wheezing, diarrhea, and shock (low blood pressure).
Your tongue can also swell and burn due to certain types of anemia, such as seen with iron deficiency and vitamin B12 deficiency. The condition may also be as a result of other factors, such as general lifestyle, diet, allergies and other environmental factors. It might also be as a result of ingesting hot foods or drinking overly hot drinks as this can physically burn the tongue and cause long-lasting irritation.