Just hoping to leave a quick update here. I'm continuing to experience at least daily episodes of sciatic nerve pain in the back of my right upper leg. It feels like sudden lightning bolts of intense pain that strikes, usually without warning, and fires at will for however long it wants - sometimes it's one or five quick strikes, sometimes it goes all day. I frequently jump from the startling pain. It's very bizarre.
One of my past doctors suspected my Piriformis muscle was impinging upon this sciatic nerve because it was so tense after I was rear-ended a few years ago. I don't know if I'm asymmetrical or what, but the right nerve acts up significantly more frequently than the left, though I have had it occur on the left, occasionally.
When it happens, if possible, I try to put pressure on the painful area behind my thigh, sitting on a tennis ball if available, or/and bring my foot up to my other knee and lean forward to stretch and loosen the Piriformis muscle in my butt, which is supposed to help. With Myofascial Pain Syndrome tensing up most of my muscles all of the time, I am likely going to have to live with these intrusive little surprises for the rest of my life, so I'm trying to deal with it as best as I can when it happens, then just go one with whatever it interrupted (work, walking, dinner, sleep, etc.).
There's also been an odd facial heat thing going on with me and that is continuing and possibly worsening. Two nights ago, I felt significant sinus pressure and discomfort in my face. I had developed a painful sinus headache that prevented me from sleeping most of the night. The pillow would not feel comfortable to my aching head! I had that headache most of the day yesterday, and it settled in the sinuses just above the bridge of my nose and above the eyebrows. In addition, starting last night in the evening, my nose heated up and turned really red for several hours. All this for no apparent reason. I didn't hit it or blow my nose or have congestion or get sick or anything. It just turned red, like Rudolph. It was blazing hot to the touch - even hotter than my cheeks. I'm noticing that it's happening most of the day today. :(
Googling and suspicions have gotten me as far as suspecting sinusitis, a respiratory infection, allergies, or rosacea. This is all new to me, so I'm not sure what's going on with my sinuses. I just hope it's temporary and not serious.