The black blood vessels under the tongue, clinically, generally suggests that the patient has too much blood stasis, high venous pressure, resulting in part of the blood infiltration to the outside of the blood vessels and subcutaneous tissues, so that the patient appeared sublingual blood vessels black, purple manifestations. Clinically, the following adjustments can be made: First, it is recommended that the patient draw blood to check the blood lipids and blood viscosity, most of them may have high blood lipids, high blood viscosity and other related changes, if the blood lipids are high, it is recommended to take lipid-lowering drugs for lipid-lowering treatment. Second, for such patients to pay attention to the combination of work and rest, the usual diet eat more vegetables, fruits, avoid overeating, do not eat too greasy, spicy, stimulating things, usually pay attention to light diet, eat nutritious and easy to digest things.