need more sleep

deprive of sleep.
everyday sleep only about 4 hours.
why? beacuse my big girl keep waking up and say itchy here itchy there.
she cannot sleep,and i have to help her apply lotion this and that every hour.
sometimes every 15 mins she will call me to wake up.
my mood is bad, temper is bad, and i need more sleep.
felt like screaming at her everytime she wakes me up.
when will this whole episode of skin problem ends?
i need to sleep and she needs to sleep also.