I am 35 and had a sebaceous cyst that was very large on my face it was between my eye and ear on the bone right under my right temple it or something caused my temple to go numb and I felt like I was going to pass out, the doctor said I had a vasovagal reaction and when I could to have the cyst removed. I have had most of the cyst cut out by a doctor but the numbness has come back, I am getting the feeling that I m going to pass out and am worried i am going to have a stroke or brain aneurism.
Only rare possibility is of infection from face to go in veins of brain-that if from "danger area "of face to cavernous sinus. But that is only if the cyst is infected and it's located at danger area of face. Possibly you have panic attack with feeling of impending doom (as if you are going to pass out). And don't worry about stroke or brain aneurysm. These not happen due to cyst on face.