I dropped my curling iron on my brest two dats ago and it burned it. the skin turned black then peeled off. what should i put on the burn?

Burn on breast: You can see a dermatologist who can prescribe silver sulfadizine cream. You will apply thie to the wound untill it heals.

Treating burn: If a burn is superficial and the skin is completely healed (if there is no open sore), the only thing that needs to be done is to treat the area gently when doing routine skin care and to avoid sun exposure. If the burned area is still open, keeping the area moist and protected will help it heal faster. If the burn is painful or swollen, it needs to be shown to a doctor.

Vaseline ointment: What you describe is most likely a 1st degree burn. This is a superficial burns which affects only the epidermis, causing redness & discomfort. There is no scarring but you may have discoloration. Healing occurs in 3-5 days, injured epithelium peels away from the healthy skin. Best way to treat this is to apply a thin layer of vaseline 2-3x/day and let time do the rest.