Whats the reason when a person gets angry and how to fight with this? Are we angry when we raise our voice?

ב"ה Shalom I am sorry but I don't fully understand what your question is. Please clarify a bit more and give more details and I will gladly try to answer. in the meantime, I can just quote Talmud (Nedarim 22a) which says : Rabbi Shmuel bar Naḥmani said that Rabbi Yonatan said: Anyone who gets angry, all kinds of Gehenna rule over him, because anger causes him to transgress all kinds of severe sins, as it is stated: “Therefore remove vexation from your heart and put away evil from your flesh” (Kohelet 11:10), All the Best