Aneurysm

Aneurysms generally do not present signs or symptoms unless they are already at a dangerous level, that is, either quite large or when they burst. If they burst, they are likely fatal.

Small, unchanging aneurysms generally will not produce symptoms, whereas a larger aneurysm that is steadily growing may press on tissues and nerves.

According to the Mayo Clinic, aortic aneurysms often enlarge slowly and without symptoms, making them difficult to detect.

There may be some symptoms -- though not everyone will have them -- as an aortic aneurysm enlarges: