Umm, no.
Is this leukimia terminal? I myself have been treated for leukimia.
It may make yu taller but yur head well not get bigger
go to the creation hall and make a character after that when your drawing your character make the head bigger then draw a cloud on the head and your done (to make the head bigger just click on the thing with 4 arrows then there should be dots on the body then click the dot on the head and make it bigger)
Your mushroom head is big enough, and no, you can't make it bigger (although there are lots of people who have phony enlargement schemes to sell you). Sex is not about size.
you
leukemia
No
get an infection so it swells up.
It allows you to make your head bigger
yes
nothing
No, maybe rounder. But gaining weight -typically- would make one's head look smaller, due to the increased body volume in comparison to the head.