OK , first of all i'm sorry for the mistakes i make and etc. (english isn't my main language).
So I'm a male and i have noticed something (im in puberty) my left nipple is hurting , and for example when i squeeze it there is a liquid coming out , and when i touch my button , there is something like a circle which is hard and when i press it it hurts me , I'm not sure whether it's something i should worry about , i'm asking in the forum to see some feedback before i go to my doctor and ask what should i do.