Headache frequency seems to have a greater impact on the association with respiratory or allergic conditions than headache diagnoses.
[ncbi.nlm.nih.gov]
In addition to allergies, ENT specialists treat deviated septum, rhinitis, sinusitis, sinus headaches and migraines, nasal obstruction and surgery, and more. Dr.
[entnet.org]
The association increased with increasing headache frequency.
[ncbi.nlm.nih.gov]