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Sublingual Vessels
The sublingual vessels 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 vessels include: coarse and long vessels resembling a net, varicose vessels, and blood stasis in the vessels.
1. Normal Sublingual Vessels (Figure 2-66)
Figure 2-66 Normal Sublingual Vessels
Characteristics: The sublingual vessels are large longitudinal vessels located on both sides of the lingual frenulum, with a diameter of less than 2.7mm and a length not exceeding 3/5 of the distance from the sublingual tubercle to the tip of the tongue. The color of the vessels is light purple.
Clinical Significance: Normal sublingual vessels.
2. Coarse and Long Vessels Resembling a Net (Figures 2-67, 2-68)
Figure 2-67 Coarse and Long Vessels Resembling a Net 1
Figure 2-68 Coarse and Long Vessels Resembling a Net 2
Characteristics: The sublingual vessels are swollen and elongated, appearing purple or purplish-black in a net-like pattern.
Clinical Significance: This is a sign of Qi and blood stagnation.
3. Varicose Vessels (Figure 2-69)
Figure 2-69 Varicose Vessels
Characteristics: The sublingual vessels are significantly varicose and thickened, with a color of bluish-purple or dark purple.
Clinical Significance: Often caused by Qi stagnation and blood stasis, leading to obstructed blood flow.
4. Blood Stasis in the Vessels (Figure 2-70)
Figure 2-70 Blood Stasis in the Vessels
Characteristics: The sublingual vessels or smaller vessels appear bluish-purple or purplish-black, or the vessels may present as unevenly sized blood stasis nodules resembling purple beads.
Clinical Significance: This is a sign of blood stasis, which can be caused by various factors such as blood cold, blood heat, Qi stagnation, phlegm-dampness, and Yang deficiency.
Editor: Zhi Zi Proofreader: Bai Hui
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