i do it great at some first days but when the second week pass by it's uncomfortable to straight my posture or breath by mouth by accident

Like tell me anything, any advice you got Lemme introduce myself: Name: Valeriee [yes, with 2 ee's] or Val Age: 15 [turning 16 in April] Height: I haven't measured it this year😭[I KNOW I KNOW] but I was 5'7 last year alright Talents: [yes, I AM talented hehe]: Ballet, singing and annoying my neighbours, dancing, yapping [a lot]

Any experts here know how to expand the width of the lower jawbone ( my palate is quite wide but the jawbone is not and it looks imbalance and cooked ) Any exercise beside chewing to expand this ( like thumbpulling for wider palate ) Appreciate it .

I am 15 and I have a naturally receding hairline due to my genetics. Do you think a derma roller can help and how much mm would be suitable?