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).
For more details about causes, see causes of a swollen tongue. A swollen tongue often occurs in conjunction with other symptoms, which vary depending on the underlying disease, disorder or condition. Other common symptoms include tongue pain, tongue lesion, and difficulty chewing and/or swallowing.