If you had this condition, it would signify that there has been a tiny amount of blood leaked into the brain lining on the right side. Symptoms might include severe head pain, vomiting, nausea, and stiffness in the neck. Causes can be high blood pressure or an injury to the head such as from a fall or car accident. An aneurysm burst occurs when a weak spot in a blood vessel wall swells like a balloon. Eventually, it bursts, releasing its contents into surrounding tissues, potentially affecting the brain. Often treatment involves being closely watched in the hospital where doctors will also do some tests before deciding what might need doing next. Remember always to follow your neurologist's advice carefully.