Having in mind the age and the medical history of your mother, the choice between coiling and clipping for the 7mm bulging lesion depends on various elements such as her overall health and the specific anatomy. On the one hand, coiling is a less invasive method and is, thus, the preferred procedure for the elderly; on the other hand, clipping, which can offer more durability, is more extensive and a bit more complicated surgery. The symptoms can be headaches or sight problems, although a great number of people remain asymptomatic. It is quite necessary to consult a neurologist.