Observation 

Sometimes, particularly for small, unruptured aneurysms that aren’t causing symptoms, doctors may recommend monitoring the aneurysm over time with regular imaging tests (MRI, DSA) to check for any changes. 

Lifestyle changes such as quitting smoking, and weight loss for blood pressure control can significantly aid in reducing the risk for aneurysm growth and rupture.  

Medication 

When observation alone is not enough, surgeons may want to give medical treatment for risk factors such as high blood pressure, to further reduce the risk of an aneurysm rupturing. 

Endovascular treatment 

Endovascular treatment is currently the most common treatment for brain aneurysms. 
It does not require general anesthesia or opening of the skull. Surgeons access the aneurysm via a catheter inserted into arteries in the arm or groin. Treatment consists of inserting small metal coils into the aneurysm, called coiling, or a newer technology called flow diversion. Flow diversion is a treatment in which surgeons insert a stent into the artery along the aneurysm, which significantly reduces and later blocks blood flow into the aneurysm. 

Surgery 

Brain aneurysm surgery is necessary when aneurysms cannot be coiled, or flow diverted due to their location or other characteristics. Patients undergo general anesthesia for this surgery. Here,an incision is made in the skin of the head and the skull is opened by removing a very small piece of bone, called a bone flap, in order to access the aneurysm directly. A small metal clip is then fastened to the neck of the aneurysm, stopping blood flow into the aneurysm. The bone flap is then reattached, and the incision closed.