DVT Complication: Signs, Risks, and What to Do

Deep vein thrombosis (DVT) isn’t just a painful calf; it can lead to serious complications if you don’t catch it early. Most people think a clot stays put, but it can travel, damage veins, and even affect your lungs. Below we break down the main complications you should watch for and give you simple steps to keep them at bay.

Pulmonary Embolism – When a Clot Takes a Trip

The biggest worry is a clot breaking loose and heading to the lungs. That’s called a pulmonary embolism (PE). Symptoms show up fast: sudden shortness of breath, sharp chest pain that gets worse when you breathe, a rapid heartbeat, or coughing up blood. If any of these pop up, call emergency services right away. Early treatment with blood‑thinners or clot‑busting meds can save your life.

Preventing PE starts with moving. If you’re on a long flight, get up every hour, stretch your legs, and wear compression socks. After surgery, follow your doctor’s plan for anticoagulants and leg exercises. Even a short walk around your home can keep blood flowing.

Post‑Thrombotic Syndrome – The Long‑Term Pain

Surviving a clot doesn’t mean you’re out of the woods. Up to 50% of DVT patients develop post‑thrombotic syndrome (PTS). That’s when the damaged vein walls cause swelling, aching, skin changes, and sometimes ulcers on the lower leg. It can linger for years and limit daily activities.

Good news: you can lower the risk. Wear graduated compression stockings for several months after the clot clears. Keep your weight in a healthy range, stay active, and avoid standing or sitting for long stretches without moving. If you notice persistent swelling or skin discoloration, see a vascular specialist. Early intervention with compression therapy or minor procedures can halt progression.

Other complications include recurrent DVT, where a new clot forms after the first one heals, and chronic venous insufficiency, a slower version of PTS that leads to fluid buildup. Both share the same warning signs—leg swelling, heaviness, or pain that worsens after a day of sitting or standing. Regular check‑ups and blood‑thinner adherence are key to catching them early.

So what should you do right now if you suspect a DVT or one of its complications?

  • Check your leg for swelling, warmth, and tenderness. A sudden change in leg size compared to the other side is a red flag.
  • Move as soon as it’s safe. Even gentle ankle pumps can keep blood flowing.
  • Contact your doctor if you have risk factors like recent surgery, cancer, long travel, or a history of clotting.
  • Follow any prescribed anticoagulant regimen exactly—missing a dose can let the clot grow.
  • Invest in a good pair of compression stockings and wear them as directed.

Remember, DVT complications are preventable when you’re proactive. Keep an eye on symptoms, stay mobile, and stick to your treatment plan. With those steps, you’ll reduce the chance of a clot turning into a bigger problem and get back to your daily routine faster.