A sinus infection can cause extreme inflammation of the sinus membranes, which can make a person feel dizzy. It can become difficult for a person to head forward or get up from a position where they are sitting. A person feels off-balance. Sinus infection affects the cavities surrounding the eyes, nose, and forehead, which further leads to painful inflammation and bacterial infection. It is because of this, a person goes off-balance, feels dizzy, and loses coordination.

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