she should go to a specialist(neurosurgeon or neuroendovascular surgeon) and have endovascular surgery, that is: coiling of the aneurysm. Her aneurysm is not samll at all and is very easily ruptured because of the hypertension, emtion (stress) and many other factors.
when the aneurysm ruptures, the headache is killing because the blood is leaking into cerebral spinal fluid (it is called subarachnoid hemorrhage, it is one type of hemorrhage strokes) and the death rate is over 50%. the ruptured aneurysm also need surgery (either coiling or open brain surgery), and it takes very long time to recover and many patients have cognitive or physical complications for the remaining life.
whereas unruptured aneurysm coiling is a small surgery through the artery at the groin area, and patient only stays in the hospital overnight.
you mom is not old, you should suggest her to seek further opinions in the big hospitals in China.
good luck.
