I just started having this too! It is the weirdest thing and makes me feel like I’m crazy. I get this sharp pain in the top, left side of my head. Almost like I am being electrocuted. It lasts a second or too but then my scalp is very sore to the point where if I part my hair there it really bothers me. Do you have any other medical issues? The reason I ask is because I had muscle weakness a year ago that is resolving and I’m scared this could be related some how.