Acute sinusitis; Chronic sinusitis 

Cluster Headache; Headaches; Tension Headache 

Sinusitis is inflammation, either bacterial, viral, allergic or autoimmune, of the paranasal sinuses.

A headache is a condition of mild to severe pain in the head; sometimes upper back or neck pain may also be interpreted as a headache.

Sinusitis as related to Headache