Forehead reduction surgery won’t take you away from your normal daily activities for too long. Regardless of how complicated your surgery may be, recovery should take only a week or so, and most patients are free to return to work three day after surgery. Patients are presentable as soon as one or two days after with brushing the hair forward over the sutures that get removed at one week.
Of course, how fast a patient heals depends on postoperative requirements, so it's vital to listen to your surgeon, so you don't run into any complications down the road.