No, a pulmonary embolism should not be left to go away on its own; it needs urgent medical care and blood-thinning treatment.
A pulmonary embolism, often shortened to PE, is a blood clot that travels to the arteries in the lungs. When that happens, blood flow through part of the lung suddenly drops. That strain can trigger low oxygen levels, heart stress, and, in many cases, sudden death if help does not arrive in time.
People sometimes ask whether the body can clear this clot without treatment. The medical answer is more complex than a simple yes or no, but one thing stays constant: you should never wait to see what happens. Doctors treat pulmonary embolism as an emergency because untreated clots in the lung carry a high risk of death and long-term problems.
Can A Pulmonary Embolism Go Away On It’s Own? Short Answer And Risks
Many people type “can a pulmonary embolism go away on it’s own?” into a search box after a scare with chest pain or a clot in the leg. That search comes from a wish to avoid strong medicines and from hope that the body will quietly fix the problem.
Studies from large groups of patients show that untreated pulmonary embolism can lead to death in roughly one quarter to one third of cases, especially when the clot is large or when heart strain is present. With diagnosis and modern anticoagulant treatment, the chance of dying from a pulmonary embolism falls to under one in ten in many reports.
So, the better way to phrase the question is this: “Can my body help clear this clot while I stay on the right treatment?” In most cases, yes. Blood thinners keep the clot from growing while the body slowly breaks it down. The main point is that the body needs that medication help; waiting for a pulmonary embolism to clear on its own without care is dangerous.
| Scenario | What Usually Happens | Risk Level |
|---|---|---|
| Large PE With No Treatment | High strain on the heart; strong chance of low blood pressure and sudden collapse. | High risk of death in the short term. |
| Medium PE With No Treatment | Ongoing shortness of breath and chest pain; clot can extend or break apart again. | High risk of death or serious damage. |
| Small PE With No Treatment | Some clots shrink over time, yet new clots can form and symptoms can return suddenly. | Ongoing danger; not viewed as safe. |
| PE Treated With Anticoagulant Pills | Clot usually stabilises; body breaks it down over weeks to months. | Lower short-term risk when bleeding risk is managed. |
| PE Treated With Clot-busting Drug | Used for life-threatening cases; medicine breaks up the clot more quickly. | Can save life but carries bleeding risk. |
| PE With Vena Cava Filter Only | Filter catches new clots from the legs; existing lung clot still needs time to resolve. | Used when blood thinners are unsafe; close follow-up needed. |
| Tiny Subsegmental PE In Low-Risk Person | In some cases, doctors may choose close monitoring with or without blood thinners. | Plan depends on symptoms, scan results, and overall risk factors. |
What Actually Happens To The Clot Inside Your Lungs
To understand why doctors react quickly to pulmonary embolism, it helps to know what the clot does inside the lung. A PE usually starts as a deep vein thrombosis in the leg or pelvis. A piece of that clot breaks loose, rides through the heart, and lodges in a lung artery. That blockage stops blood from reaching part of the lung and forces the heart to pump harder against sudden pressure.
Over time, special proteins in the blood break clots down in a process called fibrinolysis. This process does not work instantly, and during that window the clot can still limit blood flow and strain the heart. Anticoagulant medicines do not melt the clot; they stop new clot from forming so the body’s own system can do the clearing work more safely.
Guidelines from major groups such as the European Society of Cardiology and the American College of Chest Physicians recommend at least three months of therapeutic anticoagulation for most people with acute pulmonary embolism. That time frame gives the body space to heal and lowers the chance that a fresh clot will form.
Pulmonary Embolism That Clears On Its Own: When Doctors May Watch
There is one narrow situation where this question about a clot that clears on its own comes up in a different way. Some scans detect tiny clots at the edge of the lung, called subsegmental pulmonary emboli. These can show up in a person who feels close to normal and has no clear clot in the legs.
Specialists sometimes debate whether every tiny subsegmental clot needs full-dose anticoagulation. For a person with no symptoms, no deep vein thrombosis on leg ultrasound, and low long-term risk for more clots, a team may choose structured monitoring with clear safety instructions. Even in that setting, the plan includes rapid access back to care if new pain, breathlessness, or fainting appears.
Why Untreated Pulmonary Embolism Is So Dangerous
Pulmonary embolism ranks among the leading causes of sudden cardiac death. The Centers for Disease Control and Prevention notes that venous thromboembolism, which includes PE, affects hundreds of thousands of people each year in the United States alone. Many events are missed until after death, which shows how fast trouble can develop.
When a large clot blocks blood flow in the lungs, the right side of the heart faces an abrupt rise in pressure. That side of the heart can weaken, blood pressure can fall, and oxygen levels can plummet within minutes. Even survivors of a big untreated PE can face chronic shortness of breath, chest discomfort, and activity limits due to a condition called chronic thromboembolic pulmonary hypertension.
Treatment Options That Help Your Body Clear The Clot
Once a pulmonary embolism is diagnosed, the main treatment is anticoagulation. Common options include low-molecular-weight heparin injections, vitamin K antagonists such as warfarin, and direct oral anticoagulants in tablet form. These medicines reduce the blood’s tendency to clot, which prevents extension of the existing clot and lowers the risk of new clots.
For people with life-threatening PE, such as those with shock or sustained low blood pressure, doctors may use thrombolytic drugs delivered through a vein or by catheter directly into the lung arteries. In selected cases, surgeons remove clot material through an operation called pulmonary embolectomy. These higher-intensity treatments carry bleeding risk, so they are reserved for situations where the immediate danger from the clot outweighs those risks.
When a person cannot receive blood thinners at all, perhaps due to active bleeding or a recent major operation, a team may place an inferior vena cava filter. This small device sits in the main vein that carries blood from the legs to the heart and catches large clots travelling toward the lungs. Filters do not treat the existing pulmonary embolism, but they can reduce the chance of another large clot while other problems improve.
Trusted resources such as the CDC blood clot information pages and the American Lung Association pulmonary embolism guidance describe these approaches in more depth and stress the value of rapid, guideline-based care.
Recovery Timeline And Life After A Pulmonary Embolism
Recovery from pulmonary embolism varies widely. Some people with small clots feel close to normal within a few weeks, while others with large clots need months before they regain strength. Many will stay on anticoagulant medicine for at least three months; some remain on it for a year or longer, especially when clots appeared without a clear trigger or when risk factors continue.
During recovery, doctors often advise a steady increase in activity instead of strict bed rest. Gentle walking helps blood move through the legs, which lowers the chance of fresh clots. Activity usually follows symptom limits, with gradual progress guided by follow-up visits.
| Warning Sign | How It Feels | Why It Matters |
|---|---|---|
| Sudden Shortness Of Breath | Breathing feels hard or faster than usual without explanation. | Suggests a new blockage in lung blood flow. |
| Sharp Chest Pain | Pain worsens when you breathe in, cough, or move. | Common symptom when lung tissue loses blood supply. |
| Coughing Up Blood | Blood-streaked mucus or bright red blood from the lungs. | Signals possible lung tissue damage from a clot. |
| Fainting Or Near-Fainting | Sudden collapse, dizziness, or feeling about to pass out. | May indicate dangerous strain on the heart. |
| Fast Heart Rate | Heartbeat races at rest without clear reason. | Body may be compensating for low oxygen or low output. |
| New Swelling In One Leg | Calf or thigh feels warm, tight, and tender. | Could reflect deep vein thrombosis feeding more clots. |
How To Lower The Chance Of Another Pulmonary Embolism
Once someone has lived through pulmonary embolism, preventing a second event becomes a central goal. For many, that means staying on anticoagulant therapy for as long as the benefit outweighs the bleeding risk. Skipping doses raises the chance that new clots will form, so routines such as pill boxes and reminders can help keep treatment on track.
Risk factors also matter. Smokers are encouraged to quit. People with obesity gain from steady weight loss strategies. Those with cancer or hormonal treatment work with their oncology or gynaecology teams to balance clot risk against other needs. During long trips, frequent leg movement, calf stretches, and short walking breaks reduce leg vein stagnation.
Main Facts On Pulmonary Embolism That Clears On Its Own
When you read through the question “can a pulmonary embolism go away on it’s own?”, the most honest answer is that the body can often clear clots over time, yet relying on that process without treatment is unsafe. Anticoagulant medicines give the body the best chance to break down the clot while protecting you from new events.
If you or someone near you has sudden shortness of breath, chest pain, or fainting, especially after surgery, pregnancy, long travel, or a period of immobilisation, call your local emergency number right away. This article can help you understand the condition, but it cannot replace care from a qualified health professional who knows your history and can review your test results in detail.
Mo Maruf
I created WellFizz to bridge the gap between vague wellness advice and actionable solutions. My mission is simple: to decode the research and give you practical tools you can actually use.
Beyond the data, I am a passionate traveler. I believe that stepping away from the screen to explore new environments is essential for mental clarity and physical vitality.