I have no doubt this morning that my dreadful headaches are sinus-driven. A nice, sharp front gusted through last night -- and woke me up with stabbing pains on the left side of my face. OTC pain med and a hot, moist washcloth took the edge off and I was back asleep in no more than an hour.
But yowza, that was pretty bad when it hit. I could barely stay vertical. Fortunately, there was no need to.
Introduction to Sim
3 months ago