The bruise under the tongue is particularly strong, not necessarily a disease, consider the normal base of the tongue blood vessels. 1. The blue veins under the tongue are particularly strong, not necessarily a disease, usually normal venous blood vessels of the base of the tongue, is a normal anatomical structure of the human body. 2. The oral cavity and face are rich in blood, blood vessels crisscross, the veins under the tongue are located under the mucous membrane, the mucous membrane is thin, can obviously reveal the color of the veins, the appearance of purple veins, customarily referred to as bruises. Turning dark red or purple and looking thicker, this is a normal physiological state, not a pathological condition. Excessive consumption of spicy food stimulation, or by local foreign body friction will be more obvious. So the blue veins under the tongue is not necessarily a disease, but may also be a normal physiological structure, feel abnormal need to consult a doctor for examination, a clear diagnosis.