Have had severe pain in the back of my head for months. Have also had hot / cold sensations on top of head, vision and hearing changes, profuse bleeding from gums, and a hard bump on the back of my head that wasn't there until a few months ago. Apparently Covid can cause "occipital neuralgia" which is due to the virus eroding away connective tissues.

Prior to this, had no strength in my legs and could not walk or go to the bathroom for months.