Hey my guy, sweating is an essential bodily function and it’s very normal. However, when that sweat dries up and the armpits are not cleaned, it can produce a bad odor. Some of the young people may have smelly armpits because of puberty when the body is hormonal. To reduce and eliminate the smell, it is key for you to keep proper hygiene by;
Shaving pubic hair.
Using a deodorant after bathing.
Wearing clean clothes