Could using non-permanent hair dye, and not letting it touch the roots of my hair, cause hair loss ?

Is it bad in any way for my hair, or will it make it thin?





I'm trying to convince my mum into letting me dye it again witha non-permanent colour that washes out in 8 washes.Could using non-permanent hair dye, and not letting it touch the roots of my hair, cause hair loss ?
any chemical has the potential to harm your hair ,