How do I

How do i make it so when i pick up a health potion its not making my health go past the width i made it.

Without the capx or screen grabs we will only be guessing - but if you are doing what I think you are doing it will be something like

pick up health potion

add to health the value of the health potion

set width of health sprite to health

close ?

in which case you just need to check if health is now bigger than maximum health and if so make health equal maximum health

look at "clamp"

https://www.scirra.com/manual/126/system-expressions

thanks!