3.1 engine tick

I haven't started my Beretta in about a month and just got it fired up the other day, seems to idle fine and all but there is a very steady tick coming from the engine. Could one of the valves be stuck since it hasn't been run in awhile? I didn't notice this tick before I stopped driving the car, but that doesn't mean it wasn't happening. I still haven't driven the car, but I let it run a good 30-40 mins, revved it up to about 2500rpms and held it there for a few mins, but the ticking still persisted, I was hoping that lubing the engine up may have stopped the ticking but it didn't seem to help. Any thoughts?