Aqueminianswered grow question 3 years ago That definitely looks like a pest problem to me. Check your plant the best you can. Top leaves, bottom leaves, stem, nodes. They will be small so it's best to use a loop, or keep your phone camera handy and if you see ANY specks zoom in and take a picture as close as possible.
Spider mites will leave webbing somewhere. Some bugs can burrow inside the leaf or stem a d cannot be wiped off.
Azamax, azapro. Are great for pests in vegetation. I personally use Armor Si as a foliar feed very very lightly 2 times a week and I haven't had bug problems since. I think they hate the taste. I do more damage to my plants then anything now. Just my personal opinion, I could be wrong.