Hi, The symptoms told by you of continuous pressure of forehead can be due to sinus involvement. However in sinus infection
there is diurnal variation of pain and worsening of pain during cold is present. In your case no improvement following sinus surgery
suggests there is other cause of your headache. MRI or CT of the sinuses
and brain would give more information about your sinuses. Its more likely that your symptoms are stress
related. Best of luck.