There are many signs to show this. There is significant increase in the height and weight of the body. Also the body becomes sexually mature.
you should know
The effects of puberty can last into the early 30's.
you will have a period
You should know that during puberty your body becomes sexually mature. also the overall body develops .
Usually 23 but I was a early bloomer and hit puberty at 18
You have begun puberty for sure when you begin to have sexual urges and pubic hair around "The Boys."
if you keep growing
..then you know? what's your question?
It's not necessary to know when he started puberty. Most boys start at around 12 or 13-years-old.
just look at their body
I Don't know, do you? It is impossible to say as everyone grows at different rates and are different sizes at puberty.
Well, during puberty boy or girl, you grow more in different ways. Hope it helped if you want to know more do some research about puberty! -Thanks for reading