<p class="medical-review-badge"><strong>Medically reviewed by Dr. Obinna Nwobi, MD</strong> — Board-Certified Vascular Surgeon, Vein Health Clinics | <em>Last updated: July 2026</em></p>
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<p>Deep vein thrombosis (DVT) occurs when a blood clot forms in a deep vein, usually in the leg. The top warning signs include leg swelling (present in roughly 70% of cases), calf or thigh pain that may feel like a cramp or deep ache, warmth in the affected area, and reddish or bluish skin discoloration. DVT pain often comes and goes depending on activity level and body position, which can cause people to dismiss the symptoms. According to the National Heart, Lung, and Blood Institute (NHLBI), DVT can be life-threatening if the clot breaks free and travels to the lungs, causing a pulmonary embolism. <strong>If you have DVT symptoms — especially sudden shortness of breath, chest pain, or rapid heartbeat — call 911 immediately.</strong></p>
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<p>Deep vein thrombosis (DVT) is a serious medical condition in which a blood clot forms in one of the deep veins of the body — most commonly in the lower leg, thigh, or pelvis. According to the <a href="https://www.cdc.gov/blood-clots/about/index.html" target="_blank" rel="noopener noreferrer">Centers for Disease Control and Prevention (CDC)</a>, DVT and pulmonary embolism (PE) affect an estimated 900,000 Americans each year and cause approximately 60,000–100,000 deaths annually.</p>
<p>The danger with DVT is that symptoms can be subtle or intermittent, causing many people to delay seeking care. As a vascular surgeon who diagnoses and treats DVT regularly, Dr. Obinna Nwobi, MD emphasizes that early detection is critical — the sooner a DVT is identified, the sooner treatment can prevent the clot from growing or traveling to the lungs.</p>
About The Author
Dr. Obinna Nwobi
Dr. Obinna Nwobi is a board certified vascular surgeon, who chose to practice in an underserved area in Florida. In a field that graduates only 100 new vascular surgeons a year, Dr. Nwobi is an exemplary vascular surgeon who worked for the Indian Health Services, Veterans Affairs Hospital, and large private and public hospitals.
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