When it was hot, red spots appeared on my legs.

This is keratosis folliculi. That is, the hair follicle can't grow, and the keratin is hardened by curling up in the pores. Not when I was young, most of them were adolescence, which didn't hurt or itch, but wearing short-sleeved clothes in summer with small pimples didn't look good. That's what I do. When I didn't know it before, I squeezed it with my hands, leaving little red dot as a result, and I couldn't squeeze it out.

This phenomenon will not be cured, but can only be alleviated. The most important thing is that when this happens in adolescence, treatment will begin. Take more vitamin A and use ointment containing vitamin A to soften the cutin on the surface. It is best to rub the epidermis when taking a bath, and then apply ointment to make the hair follicle mouth open and grow pores. One of my classmates grew up as a teenager. Later, he used this method, and now his arms are very smooth.