gREEn7o0answered grow question a year ago Could be a few things.
First let's get some info:
Is it affecting all leave/all of plant?
Is plant dried out fully between waterings?
Do you have fans pointed directly at the plant, and are they on full blast, are they oscillating, and are the areas they hitting hardest having the issue worse than rest of plant?
What is environmental conditions looking like?
(Humidity / Temperature)
What is your growing medium?
(Coir/hydro/soil)
What kind of light, how far from plant, is it on full power?
That could be wind damage/burn, could be overwatering, could be light stress, or a number of other things.