Sphenoid Sinusitis: Headaches, Fungal Causes, and Treatments Have you ever had a headache so bad it seemed like your skull was splitting? I when felt like that, snuggled in bed, not able to face the sunlight. I was dealing with sphenoid sinusitis, a condition that can actually tinker your life. https://trevorhegkl.mybuzzblog.com/11129920/how-much-you-need-to-expect-you-ll-pay-for-a-good-sphenoid-sinusitis