On some of my chili peppers (approx 1 month old, grown under artificial light), the leaves are rolling up / shriveling up, and little light-green raised dots are appearing on both sides of some leaves. The dots seem to be denser along the veins of the leaf, particularly on the underside.
What could be the cause of this, and what can be done to fix it?
There is what appears to be a small brown insect on the topside of one of the leaves in the first photo - can't really tell what it is.
Otherwise, the rolled leaf edges could be due to too much uv (you'll know because you know what type of grow lights you're using) but otherwise, edema might be the issue - that also can cause leaf rolling round the edges, as well as this blistered, bumpy look, see here https://www.gardeningknowhow.com/plant-problems/environmental/treating-edema-in-plants.htm
I can't tell from the final image whether the tiny bumps are insects, or whether it's more evidence of edema (or oedema, as I spell it!), but if you suspect an insect infestation, use neem oil spray to treat with, spraying both the top and underside of the leaves as well as the stem. Otherwise, for edema, some adjustment to your watering regime is necessary, as mentioned in the link above.
Chillies are a form of peppers and like to stay moist not wet but also give it a misting and see if any spider webbing is present, this will indicate the presence of spider mites. Water and soap will help get rid of the mites but remember to spray when cloudy and do so every seven days. Use of compost or manure can enrich plants with nutrients.
