Can Sinus Infection Cause Fainting Jun 2026

This is the number one culprit. When you have a sinus infection, you may have a fever, which causes sweating. You might also be breathing through your mouth because your nose is stuffed, which dries you out further. If you aren't drinking enough water because you don’t feel well, your blood volume drops. Lower blood volume means lower blood pressure, which is a primary cause of fainting.

Don't dismiss fainting as a normal part of having a sinus infection. While feeling dizzy or "faint-ish" is common, actually passing out is a red flag that requires medical evaluation to rule out more serious heart, neurological, or infectious causes. can sinus infection cause fainting

A sinus infection (sinusitis) , but it can trigger several physiological responses that lead to a loss of consciousness (syncope) . While most people experience standard symptoms like facial pain and congestion, the secondary effects of the infection—such as inner ear pressure, dehydration, and even changes in blood pressure—can make fainting a real possibility. How a Sinus Infection Can Lead to Fainting This is the number one culprit