Sudden weakness or numbness on one side of the body may occur if bleeding or pressure affects the brain.
These symptoms should always be treated as a medical emergency.
### 10. Loss of Consciousness
A ruptured aneurysm can rapidly lead to fainting or loss of consciousness.
Immediate emergency treatment offers the best chance of survival.
## Signs of an Abdominal Aortic Aneurysm
An abdominal aortic aneurysm develops in the portion of the aorta that passes through the abdomen.
Many cause no symptoms until they become large.
Possible warning signs include:
* Deep, constant pain in the abdomen
* Pain in the back or side
* A pulsating sensation in the abdomen
A ruptured abdominal aortic aneurysm may cause:
* Sudden severe abdominal or back pain
* Dizziness
* Rapid heartbeat
* Sweating
* Loss of consciousness
This is a medical emergency.
## Signs of a Thoracic Aortic Aneurysm
Thoracic aortic aneurysms occur in the chest.
Symptoms may include:
* Chest pain
* Upper back pain
