Head tightness aftr Sudying/eating food.

1) Problem -I have been feeling  forehead tightness tightness (Pressure like) since 3 yrs. This tightness become worse on- studying, mobile screen,  Smell of Spicy food, Eating- spicy foods, Sweet products, Banana, & Onions.No throbbing pain, only tightness. 2)All tests are Normal-Brain MRI, BP, Suger(FBS), Urine, Blood cbc, thyroid, CT PNS,Eye Check,Vit-D&B12, Prolectin, Sodium serum. 3)My earlier lifestyle- I was seriously preparing for competitive exams via Online class since 2020.So, i cut physical activities and Outdoor sports. I  devoted myself only for study in a closed room. I Used to study in mobile pdf mostly. In jan 2023, I started feeling forehead tightness while I was Studying . Gradually,I started feeling forehead tightness on eating any food. 4) Visited many doctors but What problem I have is still unknown? Currently, taking Nexdom painkiller (some releif) daily . But I always fear that it cause serious side by effects on kidney latter. Hopeless, tired in life.