Don't underestimate the toll the infection takes on your body. Fighting off a virus or bacteria requires immense energy. Add to that a stuffy nose forcing you to breathe through your mouth, and you have a recipe for dehydration. Dehydration and sheer exhaustion are classic causes of feeling lightheaded.
If your head is swimming, you want it to stop immediately. While you need to treat the underlying infection to cure the symptom fully, here are immediate ways to steady yourself. sinus infection lightheaded
It is important to distinguish what you are feeling. Don't underestimate the toll the infection takes on