Sphenoid Sinusitis: Headaches, Fungal Causes, and Treatments Have you ever had head pain so painful it felt like your head was splitting? I once seemed like that, snuggled in bed, unable to face the sunlight. I was dealing with sphenoid sinusitis, a condition that can actually mess with your life. https://sleepapnearisks49405.daneblogger.com/30839207/the-20-minute-rule-for-sphenoid-sinusitis