Sublingual veins are the longitudinal veins located on both sides of the lingual frenulum, primarily reflecting the state of Qi and blood circulation. Common abnormal manifestations of the sublingual veins include: coarse and long veins resembling a net, varicose veins, and blood stasis in the veins.
Normal sublingual veins:
Characteristics of the tongue:
The sublingual veins are large longitudinal veins located on both sides of the lingual frenulum, with a diameter of less than 2.7mm. The length does not exceed 3/5 of the distance from the sublingual tubercle to the tip of the tongue, and the color of the veins is light purple.
Clinical significance:
Normal sublingual veins.
Coarse and long veins resembling a net:
Characteristics of the tongue:
The sublingual veins are coarse, swollen, and elongated, appearing purple or purplish-black in color.
Clinical significance:
This is a sign of Qi and blood stagnation.
Varicose veins:
Characteristics of the tongue:
The sublingual veins are significantly varicose and thickened, with a color of bluish-purple or dark purple.
Clinical significance:
This is often caused by Qi stagnation and blood stasis, leading to obstructed blood flow.
Blood stasis in the veins:
Characteristics of the tongue:
The sublingual veins or smaller veins appear bluish-purple or purplish-black, or the veins show changes resembling purple beads of blood stasis.
Clinical significance:
This is a sign of blood stasis, which can be caused by various factors such as cold blood, hot blood, Qi stagnation, phlegm-dampness, or Yang deficiency.
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