Hi every time i cough bend over clear my throat i get this sharp pain in my head on the left side sometimes it lasts all day others it'll go away?

Unclear: There are many parameters I do not know that would be helpful : how long you have had this cough, are you bending your head below your waist, have you eaten enough food / drank enough fluids, are there other symptoms. The increased pressure within your body during coughing actions can sometimes cause pressure in your head. however you will need an evaluation by a professional to seek more help...