Some professionals say that stammer is caused by trauma and others say that it's caused by genetics. I personally think that it's both because my mom began stammering after she was separated from her mother then abused when she was 4, i also live in a third world country and most parents don't even bother to search a cure for their children who stutter so my mom grew like this and when i was 6 i also began stammering because of some traumas. My mom says that she stammered much more when she was a kid but now she can talk normally most of the time. As for me, i am in the most difficult period of my life because although i stammered before, i could talk fluently for very long periods of time before remembering that i actually could stammer but now even saying the simplest things in public is a great source of stress for me while i can talk or even rap totally fluently when I'm alone. So stammer always seemed psychological to me. Or else, why does it get worse when we're in public, when we're anxious, when we know that we're being heard? I'm sure that even those that stammer alone are somehow afraid or remembered of the traumas, i read somewhere that those who stammer have PTSD about certain words that made them stutter before so it's clear that the way we talk is mostly affected by our psychological state. Sometimes i did sort of theatrical speeches in front of my classmates where i read poems or said things in a confident voice and the fact that i took a sort of accent, as if it was not me who talked but a character prevented me to stutter. But when i think about doing that now, I'm afraid and I'm sure that I won't succeed because i've lost too much of my confidence, i just feel miserable lately and my stammer only makes it worse. So I'll always think that stutter takes root in the emotions and psyche, if i heal my mind, I'll also heal my stammer, I'm sure of it.