Inclusion Criteria:

• Age >18 years and <80 years, and able to understand the requirements of the study and provide informed consent and accept the exams and follow-up.
• C2 - C5 varicose veins / CVI Symptomatic primary GSV, SSV, or AASV incompetence, with reflux >0.5 seconds on color duplex, eligible for patients undergoing radiofrequency ablation.
• Color replica ultrasound or venography of the lower extremity veins shows saphenous varicose veins without evidence of deep venous stenosis, filling defects, or ultrasound abnormalities.
• No contraindications to the wearing of compression stockings (e.g., arterial insufficiency, skin allergies)

Exclusion Criteria:

• Severe deep vein valve insufficiency or acute deep vein thrombosis of the lower extremities
• Previous history of high ligation and dissection of the saphenous vein, recurrence of collateral branches of the deep vein
• Superficial vein thrombosis is present at the treatment site, with local redness, swelling, warmth, pain, and significant signs of inflammation