How do we know they are not in the brain and we aren't feeling them. Medical Science is generally full of garbage. The entire lymph system reaches into the brain according to Dr. Reggerio, hence the micro biome and these things influencing our emotions, desires, etc.
Anyway...
I use Thieves oil on my head, I use Miracle-Mineral-Supplement /CD on my head, I use YEP THEY HATE VICS Vapo rub, too, due to the Camphor and Eucalyptus, Teatree oil works too, and Colloidal Silver .