Blood stasis with blue veins under the tongue is considered by Chinese medicine practitioners to be a manifestation of blood stasis syndrome, which can be regulated by taking blood-activating and blood-stasis-eliminating (promoting blood circulation and eliminating blood stasis in the body) type of Chinese medicines or proprietary Chinese medicines. Blood stasis syndrome may be manifested by dull complexion, hyperpigmentation, easy appearance of petechiae, dull lips and mouth, dull tongue or petechiae, purplish or thickened veins under the tongue, and may also be characterized by fatigue, shortness of breath, fixed pains or lumps on the trunk or limbs, and fever in the afternoon or fever at night. The formation of blood stasis can be due to Qi stagnation, Qi deficiency, cold condensation, heat burning, etc. A physician should be consulted for specific identification. Commonly used traditional Chinese medicines for activating blood circulation and removing blood stasis include peach kernel, safflower, red peony, panax notoginseng, etc. Commonly used proprietary Chinese medicines for activating blood circulation and removing blood stasis include Compound Dangshen Tablets, Tongxinluo Capsules, and Rhizoma Ligustici Chuanxiong Granules. Consult a Chinese medicine practitioner before using the medication, and do not take the medication on your own.