How can the common cold virus lead to so much sinus pain and pressure?

It seems like I've had bad sinus pain for the longest time.

It may clear up your sinus pain and pressure.

That's when you start to have the sinus pain and pressure that make you so miserable.

His resentment boiled up behind his eyes like sinus pain.

Suffering from sinus pain and a sore throat, it got progressively worse as the week went on.

You can thank the virus that gave you that nasty cold for the sinus pain and pressure you're feeling.

One cause of many unnecessary doctor visits is sinus pain, Dr. Ramsey said.

Sinusitis, which may respond to antibiotics, shows up as sinus pain and an ugly bloody brown nasal discharge.

Q: How do I know whether I need to see a doctor for my sinus pain and pressure?