brown spotting on leaves

i have a plant that is in about 5 weeks of flowering and the leaves have brown spots on them.. this just happened like a week ago.. does anyone have any ideas???

need pics !!!!!!

i cant load any pics on this computer but they are little brown spots on the fan leaves.. can u give me some answers of what it could be???

https://www.rollitup.org/view.php?pg=faq&cmd=category&id=33

Hard to say without pics. Do some clicking on the link above. Also helps to know other stuff like feeding schedule, ph ect.