Endovascular Surgeon & Interventional Radiologist — trained at Mount Sinai & Columbia University / NYP, New York. Founder of Israel Vein Center; Senior Attending, Shamir Medical Center.
Deep clot, superficial clot, or phlebitis?
Not every clot is the same. A deep vein thrombosis (DVT) forms in the deep veins and is the dangerous kind — read our full clinical guide to deep vein thrombosis (DVT). A superficial clot (superficial thrombophlebitis) forms in veins near the skin — often in an existing varicose vein — causing a tender, firm cord with redness; it is usually less dangerous but needs assessment, because it can extend toward the deep system. DVT affects roughly 1–2 per 1,000 adults annually (CDC/ISTH epidemiology).
Risk factors
The classic triggers: long-haul flights and car rides (see our guide to flying and vein health), recent surgery or hospitalization, pregnancy and the postpartum period, immobility, active cancer, hormonal contraception or HRT, inherited clotting disorders, and untreated varicose veins with stagnant flow.
How a clot is diagnosed
The test of choice is a venous duplex ultrasound — quick, painless and definitive for leg clots. Blood tests (D-dimer) help in low-risk cases. Do not wait to “see if it passes”: untreated DVT can embolize to the lungs.
Prevention
Move regularly on flights and long drives, hydrate, use compression stockings if you have vein disease or prior clots, mobilize early after surgery, and treat significant varicose veins — stagnant blood in refluxing veins is clot-friendly territory.
Frequently asked questions
How do I know if leg pain is a clot? One-sided swelling, warmth, redness and deep calf pain — especially with a risk factor — warrant a same-day ultrasound.
Urgent duplex ultrasound — contact the clinic →
Medically reviewed by Dr. Shimon Aronhime, MD, Interventional Radiologist and Endovascular Surgeon.
Israel Vein Center — Lilienblum 17, Tel Aviv · Shamir Medical Center, Beer Yaakov · 073-3744040
Dr. Shimon Aronhime, MD — Endovascular Surgeon
📍 Lilienblum 17, Tel Aviv | Shamir Medical Center, Beer Yaakov
📞 073-374-4040 | WhatsApp
References
- Centers for Disease Control and Prevention (CDC): venous thromboembolism affects an estimated 900,000 people in the United States each year.
- European Society for Vascular Surgery (ESVS) 2022 clinical practice guidelines on the management of chronic venous disease. Eur J Vasc Endovasc Surg, 2022.
Ready to Book a Consultation?
Duplex ultrasound mapping included at the first visit
Israel Vein Center — Lilienblum 17, Tel Aviv
