Why Is One Of My Brow Bones Bigger Than The Other?

Q: Dr. Eppley, I am a man and I am 20 years old. I do not have any relevant disease, except allergic rhinitis. I have a question about my brow ridges. I notice them a little big, but I have consulted with doctors and they have told me that they are normal. My dad has it similar. I have also noticed that my left superciliary arch is a little larger than the other one. I suffered a strong blow to my left eyebrow when I was around 5-6 years old. I am not planning to undergo any surgery, I would just like to know if my superciliary arch is normal. I am from Latin America and I really do not have the economic means to undergo surgery. Thank you very much

A: The size of the brow bones is a reflection of the development of the underlying frontal sinuses which creates them. Since the frontal sizes are often paired and the two sides are separate asymmetric development of them is not uncommon particularly in men whose natural frontal sinus development is more pronounced than in women.