Hi doctor s, I am having right side head stabbing pain (last for few seconds) since three month. Sometime crawling feeling in right ear. I had done my plain mri 2 month back and all came normal. No nausea or vomiting. Only right eye gets red sometime. Neurology has advised me sensival 25 for 20 days after doing examination. I have finished for 10 days. It is giving me relief. But I still get same kind of stabbing pain sometime at top of right head. I am worried if I same pain still exits after 20 days of dose then do I need to go for mri again? Or how long I can continue same medince? Is their any side effect of this? I am worried.