Patient: N vein thrombosis in the right limb in November 08, now the skin of the right ankle is darkened and painful to touch, as if it is about to ulcerate, so I am afraid of a long-lasting ulcer. Now I am taking warfarin within the standard value and wearing elastic stockings with a pressure of 20-30mmHg. What will be the final development of venous valve insufficiency? Is it possible to avoid ulcers if I keep wearing compression stockings? (The compression is 18mmHg because the compression stockings I wore before were not therapeutic but protective) 4. Laboratory and examination results (please use the tool on the right to upload): I had a pulmonary embolism and N vein thrombosis in my right limb 15 days after I tore my muscles playing football in November 2008, and now the pulmonary embolism has been cured, but the N vein thrombosis in my right limb still exists, and I took a color B a month ago, and the results are: the right N vein is translucent, with a few slightly strong echogenic spots, and the rest of the lumen is normal, with no obvious narrowing or dilatation. CDFI: the above lumen showed colored flow signal, the right N vein showed a little filling defect, valsalva test did not show significant reflux signal. Ultrasound suggests: 1. abnormal echogenicity of the right N vein lumen (partial recanalization after thrombosis). 2. no significant abnormality in the left N vein. regurgitation signal is detected in the femoral veins bilaterally on the Valsalva test, and the regurgitation time is about 1.3sec (left) and 0.9sec (right) on the spectrum. ultrasound suggests: regurgitation is seen in the femoral veins bilaterally, and venous valve insufficiency is considered. A: Deep vein valve insufficiency in the affected limb is a sequel of deep vein thrombosis, the direct consequence is that when you stand upright, the distal end of the affected limb has elevated venous pressure due to valve insufficiency, which affects local circulation, and in the long run, the skin tissue will undergo malnutrition changes. Wearing medical elastic stockings during the day can promote venous reflux and reduce congestion and edema and fatigue in the affected limb. It is better to wear elastic stockings when doing ankle dorsiflexion exercise every day to help blood return to the affected limb. In the early stage of thrombosis in the deep vein of lower limb (2 weeks~6 months), the blood return to the affected limb is blocked and the affected limb is edematous, so level 2 (20~30mmHg) should be chosen at this time. For those who have poor deep vein patency and the affected limb is still thicker and edematous than the opposite side, they should continue to choose grade 2 compression stockings. Your current situation seems to be recovering well, so we suggest you continue to maintain the current treatment with medication, review regularly, and check again to assess the recovery situation in about six months.