Straightner burn on my forhead!?!?!?

I burnt my forehead using my straightener yesterday in the afternoon. Im trying to hide it from my mom, so i put cocoa butter on it before i went to sleep, and put something over it so she wouldnt see. I woke up this morning and the burn it has started peeling so now its pink. (Im black so its very noticeable). Should i just continue putting cocoa butter on it and let it air dry during the day or should i talk to my mom about it . How long will i have the burn? will it leave a mark? do i need to by an ointment? or is cocoa butter and air okay. HELP! PLEASE!