Most aortic aneurysms cause no sensation at all. Roughly 95% of thoracic aortic aneurysms produce zero symptoms before a serious event like rupture, and abdominal aneurysms are similarly silent in the majority of cases. That said, some people do feel physical signs, especially as an aneurysm grows larger. What you might notice depends on where the aneurysm is and how big it has become.
What a Growing Aneurysm Can Feel Like
An aortic aneurysm is a bulge in the wall of the aorta, the large artery that runs from your heart down through your chest and abdomen. When an abdominal aortic aneurysm gets large enough, the most distinctive sensation is a throbbing or pulsing feeling near your belly button. Some people describe it as feeling their heartbeat in their stomach. This may be accompanied by a deep, constant ache in the abdomen or along the side, and sometimes back pain that doesn’t go away with rest or position changes.
Thoracic aortic aneurysms, which form in the chest portion of the aorta, produce different symptoms. The most common is a deep, aching or throbbing chest pain. If the aneurysm grows large enough to press on nearby structures, it can cause a persistent cough, hoarseness, shortness of breath, or difficulty swallowing. These pressure-related symptoms tend to appear when the aneurysm occurs near the aortic arch, the curve where the aorta bends downward.
Why Most People Feel Nothing
The aorta is deep inside the body, surrounded by other organs and tissue. A small or moderate-sized aneurysm can expand for years without touching or compressing anything that would signal pain. This is why aortic aneurysms are frequently discovered by accident during imaging tests ordered for unrelated reasons. The aneurysm typically needs to reach a significant size before it creates enough pressure on surrounding tissues to produce noticeable symptoms.
Surgery is generally recommended when an abdominal aortic aneurysm reaches about 5.5 centimeters in diameter, or around 2 inches. For thoracic aneurysms, the surgical threshold ranges from 4.5 to 6 centimeters depending on the location and whether the person has a genetic condition like Marfan syndrome. Many aneurysms are caught and monitored well before they reach these sizes, often before the person has felt anything unusual.
Pulsing in Your Stomach Doesn’t Always Mean Aneurysm
If you’re thin or have a lean build, you can often feel or even see a pulse in your upper abdomen. This is particularly common in slim elderly patients and in people with a naturally elongated liver or mild curvature of the spine. The aorta sits close to the surface in thin individuals, and its normal pulse becomes more noticeable. This is a frequent, benign finding and does not by itself indicate an aneurysm.
The key differences to pay attention to: a normal aortic pulse is something you notice when lying down and pressing on your abdomen. An aneurysm large enough to feel tends to produce a wider, more prominent pulsation, and it may come with persistent pain. If the pulsing sensation is new, seems unusually strong, or is paired with abdominal or back pain, that combination is worth having evaluated.
What Doctors Can and Can’t Feel
Doctors sometimes detect abdominal aortic aneurysms through a standard physical exam by pressing on the abdomen. But this method has real limitations. Overall, abdominal palpation catches about 68% of aneurysms. The accuracy depends heavily on two factors: the size of the aneurysm and the patient’s waist size.
For aneurysms 5 centimeters or larger in people with a waistline under 40 inches, physical exam detects the aneurysm 100% of the time in published studies. But when the patient’s waist measures 40 inches or more, sensitivity drops to about 53%. Larger body size simply makes it harder to feel structures deep in the abdomen. This is one reason screening relies on ultrasound rather than physical exams alone. About one-third of new diagnoses still come from a doctor feeling something during a routine exam, but the other two-thirds are found through imaging.
Who Should Get Screened
Because most aneurysms are silent, screening is the most reliable way to find them early. The U.S. Preventive Services Task Force recommends a one-time abdominal ultrasound for men aged 65 to 75 who have ever smoked. For men in that age range who have never smoked, screening is offered selectively based on other risk factors. For women who have never smoked and have no family history of aneurysm, routine screening is not recommended. For women who have smoked or have a family history, the evidence on screening benefits is still unclear.
The ultrasound itself is simple, painless, and takes only a few minutes. It measures the diameter of the aorta and can detect an aneurysm long before it causes symptoms or reaches a dangerous size.
Signs of Rupture
A ruptured aortic aneurysm feels nothing like the slow, subtle symptoms of a growing one. Rupture causes sudden, severe pain in the chest, abdomen, or back. It comes on without warning and is often described as the worst pain the person has ever felt. Because rupture causes internal bleeding, it also triggers dizziness, lightheadedness, a rapid heart rate, and sometimes loss of consciousness. This is a life-threatening emergency that requires immediate treatment. If these symptoms appear suddenly together, call 911.