Symptoms of a “Deadly Blood Clot” You Need to Know — Eat This Not That


A deadly blood clot can be a serious medical emergency. It occurs when a clot forms in a blood vessel, blocking the flow of blood to vital organs. Symptoms of a deadly blood clot can vary depending on the location of the clot, but they can include chest pain, shortness of breath, and swelling in the affected area. Knowing the signs and symptoms of a deadly blood clot can help you seek medical attention quickly and potentially save your life. In this article, we will discuss the symptoms of a deadly blood clot that you need to know.

Symptoms of a “Deadly Blood Clot” You Need to Know

Blood clots can be deadly if they are not treated quickly. Knowing the symptoms of a blood clot can help you get the medical attention you need before it’s too late. Here are some of the most common symptoms of a deadly blood clot.

1. Swelling

One of the most common symptoms of a blood clot is swelling in the affected area. This can be in the arms, legs, or other areas of the body. The swelling may be accompanied by pain or tenderness.

2. Redness

Another symptom of a blood clot is redness in the affected area. This can be a sign of inflammation or infection, so it’s important to get medical attention right away.

3. Warmth

The affected area may also feel warm to the touch. This is a sign that the clot is blocking the flow of blood and can be a sign of a serious medical condition.

4. Shortness of Breath

If the clot is in the lungs, it can cause shortness of breath. This is a sign that the clot is blocking the flow of oxygen to the lungs and can be a sign of a life-threatening condition.

5. Chest Pain

Chest pain is another symptom of a blood clot. This can be a sign of a heart attack or pulmonary embolism, so it’s important to get medical attention right away.

When to See a Doctor

If you experience any of the above symptoms, it’s important to seek medical attention right away. A doctor can diagnose the condition and provide the necessary treatment to prevent further complications.

Approximately 900,000 Americans a year are affected by blood clots, resulting in nearly 100,000 deaths. “Everyone has different symptoms that can range from none to severe,” says vascular medicine specialist Michael Tran, DO. “But there are common signs and symptoms of blood clots to be aware of.” Here are five signs of blood clots, according to experts. Read on—and to ensure your health and the health of others, don’t miss these Sure Signs You’ve Already Had COVID.

Swollen feet

Swelling and leg pain that stays consistent could be a sign of deep vein thrombosis (DVT). “Blood clot symptoms don’t come and go quickly,” says Dr. Tran. “They stay.” Changes in varicose veins (for example hardening or bulging) could also be a sign of a blood clot.

Businesswoman feeling chest pain while working in the office.

“It may feel like a shooting pain that starts in your front and travels to the back in the chest area,” says Dr. Tran. “You may also feel chest heaviness or pressure that lasts. If it’s just fleeting, goes away and doesn’t happen again, you’re probably not dealing with a blood clot. Breathlessness or becoming easily winded with mild exertion will last for hours, even days, if there is a blood clot. If you feel breathless for a second and then you’re OK, it’s probably not.”

Man sneezing into his elbow.

Coughing up blood could be a sign of a blood clot in the lungs. “Symptoms of a DVT include swelling of the affected leg, pain, redness, warmth and new visible veins in the area,” says Clare Harris, NP. “Symptoms of a pulmonary embolism include shortness of breath, chest pain, cough or coughing up blood and fast breathing.”

Healthcare worker with protective equipment performs coronavirus swab on a woman.

Doctors are finding an increased risk of large blood clots found in the lungs and legs of people with COVID-19, even in younger people who wouldn’t usually be at risk.  “It’s likely a direct effect of COVID-19,” says cardiologist Jonathan Paul, MD.

“When you, say, fall and skin your knee, it turns your immune system on, and one of the ways your immune system reacts to an injury is by making your clotting system more active,” says Matthew Exline, MD. “It kind of makes sense that your body would say, if I see an infection, I need to be ready to clot. But when the infection is as widespread and inflammatory as COVID-19, that tendency to clot can become dangerous.”

Type A+ blood tube

Blood types A, B, or AB are associated with a higher risk of blood clots and stroke. “While people cannot change their blood type, our findings may help physicians better understand who is at risk for developing heart disease,” says Lu Qi, Ph.D. “It’s good to know your blood type in the same way you should know your cholesterol or blood pressure numbers. If you know you’re at higher risk, you can reduce the risk by adopting a healthier lifestyle, such as eating right, exercising, and not smoking.”


Follow the public health fundamentals and help end this pandemic, no matter where you live—get vaccinated or boosted ASAP; if you live in an area with low vaccination rates, wear an N95 face mask, don’t travel, social distance, avoid large crowds, don’t go indoors with people you’re not sheltering with (especially in bars), practice good hand hygiene, and to protect your life and the lives of others, don’t visit any of these 35 Places You’re Most Likely to Catch COVID.

Ferozan Mast

Ferozan Mast is a science, health and wellness writer with a passion for making science and research-backed information accessible to a general audience. Read more