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A member asked:

Do you have sinuses in the back of your head of base of your skull?

A doctor has provided 1 answer
Dr. Christopher Kager answered

Yes: The mastoids are sinuses, just behind your ear. There are also venous sinuses (different) in the back of your head as well, carrying blood.

Answered 7/3/2020

2.7k views

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I have an achy bump on the back of my head, right under the base of my skull; fells kinda like an ingrown hair. What do you think?

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