The most common heart attack symptom is chest pain or discomfort, typically felt as pressure, squeezing, or fullness in the center or left side of the chest. But heart attacks don’t always look the way they do in movies. About 805,000 people in the United States have a heart attack every year, and symptoms range from crushing chest pain to something as subtle as unusual fatigue or what feels like a bad case of indigestion.
The Classic Symptoms
Chest discomfort is the hallmark. It usually lasts more than a few minutes, or it goes away and comes back. People describe it as uncomfortable pressure, squeezing, fullness, or aching rather than a sharp, stabbing pain. The sensation may stay in the chest or spread to the shoulder, one or both arms, the back, neck, jaw, teeth, or upper belly.
Shortness of breath frequently accompanies chest discomfort, and in some cases it starts before any chest symptoms appear. Other common signs include breaking into a cold sweat, feeling lightheaded or faint, nausea or vomiting, and unusual or unexplained tiredness. Some people lose consciousness. The combination of these symptoms, especially chest pressure with shortness of breath or a cold sweat, is a strong signal that something cardiac is happening.
How Symptoms Differ in Women
Women can and do experience classic chest pain during a heart attack, but it’s less likely to be the most prominent symptom. Instead, women more often report vague symptoms: shortness of breath, nausea, back or jaw pain, dizziness, pain in the lower chest or upper abdomen, and extreme fatigue. These symptoms may come on while resting or even during sleep, which makes them easier to dismiss as stress, the flu, or just a rough night.
This difference matters because women who don’t recognize their symptoms tend to delay calling for help. Sweating, nausea, dizziness, and unusual fatigue don’t match what most people picture as a heart attack, but they are well-documented cardiac symptoms in women. If these symptoms appear suddenly without a clear explanation, especially in combination, they deserve the same urgency as chest pain.
Silent Heart Attacks
Researchers estimate that somewhere between 1 in 5 and 2 in 5 heart attacks are “silent,” meaning they happen without the person realizing it at the time. Silent heart attacks still damage heart muscle, but the symptoms are mild enough to be mistaken for something else entirely. People often think they have the flu, a sore muscle in the chest or upper back, indigestion, or just an unusually tired day. A jaw ache or arm discomfort might come and go without raising alarm.
Silent heart attacks are more common in people with diabetes, partly because nerve damage from the disease can blunt the pain signals the heart sends. Older adults are also more likely to experience minimal or absent symptoms. Many silent heart attacks are only discovered later when a routine test reveals evidence of prior heart damage.
Heart Attack vs. Heartburn
The overlap between heart attack symptoms and heartburn is real enough that even experienced doctors can’t always tell them apart without testing. Both can cause a burning or aching sensation in the chest, and heart attacks themselves can trigger nausea, indigestion, and abdominal pain, which makes the confusion worse.
A few patterns help distinguish them. Heartburn typically produces a burning sensation that starts after eating, while lying down, or while bending over. It’s usually relieved by antacids and may come with a sour taste in your mouth or a small amount of stomach contents rising into your throat. Heart attack pain is more likely to feel like pressure or squeezing, to spread to the arms, neck, jaw, or back, and to come with cold sweats, shortness of breath, or lightheadedness. Heartburn also tends to be a familiar, recurring sensation for people who get it regularly, while heart attack symptoms feel different from anything they’ve experienced before.
That said, the overlap is significant enough that if chest discomfort feels unusual, comes with shortness of breath or sweating, or doesn’t respond to antacids within a few minutes, treat it as a potential cardiac event. Esophageal spasms and gallbladder disease can also mimic heart attack pain, which is another reason chest symptoms that feel new or severe warrant immediate attention.
Why a Heart Attack Causes Pain
A heart attack happens when blood flow to part of the heart muscle gets blocked, usually by a clot forming in a narrowed artery. The affected muscle starts to die from lack of oxygen, and as those cells become stressed and begin breaking down, they release chemical signals, including compounds like adenosine and potassium, that activate pain receptors. These signals travel through nerves to the brain, where they register as chest pressure, tightness, or pain.
The reason pain can show up in the jaw, arm, or back rather than the chest comes down to how the nervous system is wired. The heart shares nerve pathways with these other areas, so the brain sometimes misinterprets where the signal is coming from. This “referred pain” is why someone can be having a heart attack and feel it primarily in their left arm or jaw with minimal chest discomfort.
Early Warning Signs
Heart attacks don’t always strike without notice. Chest pain or pressure that keeps coming back, especially with physical exertion or stress, can be an early warning sign called angina. This happens when the heart isn’t getting enough blood during periods of increased demand but isn’t yet in a full crisis. Angina typically eases with rest, while heart attack pain does not.
In the days or weeks before a heart attack, some people notice increasing fatigue, mild chest tightness, or shortness of breath with activities that didn’t used to cause it. Women in particular report unusual exhaustion in the weeks leading up to a cardiac event. These gradual changes are easy to attribute to aging, stress, or being out of shape, but a pattern of worsening symptoms deserves a closer look.
What to Do When Symptoms Start
Call emergency services immediately. Of the 805,000 heart attacks that happen each year in the U.S., about 605,000 are a first-time event, meaning most people experiencing one have never been through it before and may hesitate because they’re not sure what’s happening. Time matters enormously: the longer the heart muscle goes without blood flow, the more permanent the damage.
After calling for help, the American Heart Association recommends that alert adults experiencing chest pain chew and swallow one to two regular aspirin (162 to 324 mg), unless they’re allergic to aspirin or have been told by a doctor not to take it. Chewing gets the medication into the bloodstream faster than swallowing whole. Don’t drive yourself to the hospital. Emergency responders can begin treatment on the way and will get you to the right facility faster than you can navigate it on your own.