I got a pimple on my face and it hurts.
おできができたら、つぶさないでください。
If you get a boil, please don't squeeze it.
Usually written in kana; the kanji spelling お出来 is rare.
Kanji spelling is uncommon; the kana form is standard.
Polite prefix お + でき (from できる, 'to form, appear'), referring to something that has formed on the skin.