Bilateral means on both sides. When people are hypo, they often lose the outer edge of both eyebrows. Can you think of any reason you might be losing the hair of just one eyebrow, like the way you sleep, something that might rub against it?
I've never been diagnosed with thyroid disease,should I go to the doctor do you think.
Do you have a diagnosed thyroid condition? Loss of the outer edge of the eyebrow can be a hypo symptom, but it's usually bilateral.