Why is it some hair grows out at an angle on the sides instead of straight down? how is that prevent

I see some hair grows out at an angle but previously before hair grows straight down on the sides? why does that happen is it like a genetic change or something?

Why is it some hair grows out at an angle on the sides instead of straight down? how is that prevented?

Hair growth is like a fingerprint. The hair follicles(roots) don't change. They grow in different directions causing what we call growth patterns. If the hair is long and heavy it will appear to grow down because of the weight. When it is cut shorter it has less weight and will stick out.

Why is it some hair grows out at an angle on the sides instead of straight down? how is that prevented?

you can't really prevent that because it is a genetic trait. the only way to prevent that is to shave it all off.

Why is it some hair grows out at an angle on the sides instead of straight down? how is that prevented?

It's called Mother Nature.