No, there aren't any glands in the head that would emit such a noticeable odor.
Our dog Jaida was often called "Farty McCheese", because generally she smelled cheesy/greasy, most noticeably around her head and ears...
until we changed her diet from kibble to a diet consiting of raw meaty bones and offal. What are you feeding your dog right now?
Solomon - black DSH - king of kitchen raids (11)
Gracie - Mutterooski X - scary smart (9)
Jaida - GSD - tripod trainwreck and gentle soul (4)
Heidi - mugsly Boston Terrier X - she is in BIG trouble!!! (3)
Audrey - torbie - sweet as pie (11 months)
Patrick - blue - a little turd (but we like him anyways) (6 months)
Boo, our Matriarch (August 1 1992 - March 29 2011)