The main symptom is a sudden, severe headache, which is more intense at the base of the skull. Some people may even feel a popping sensation in their head before the hemorrhage begins.
You may also have:
neck pain
numbness throughout your body
shoulder pain
seizures
confusion
irritability
sensitivity to light
decreased vision
nausea
vomiting
rapid loss of alertness
Diagnosing SAH
Your doctor may notice that you have a stiff neck and vision problems. This combination often leads to a diagnosis of SAH. You’ll need more testing to find out the severity of the hemorrhage so that you can get proper treatment.
First, your doctor may conduct a CT scan of the head to look for bleeding in your skull. If the results are inconclusive, the doctor may use a contrast dye during the procedure.
Other tests include:
an MRI scan, which uses radio waves to get clear, detailed images of the brain
a cerebral angiography, which uses an X-ray and injected dye to detect blood flow in the brain
a transcranial ultrasound, which detects blood flow in the arteries within the brain