Pepper Plants Twisting

Question

Why do some of the leaves on my pepper plants twist so that they are upside down?

Answer 1

This is caused by a pest typically. There are a few that it could be, such as broad mite, aphids, whiteflies and others.

Treat the plant with a insecticide. I personally like neem oil as it is safe for people, pets and good bugs as well as being effective. Here is more information on it:
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm