I wouldn't use aloe vera or mango on the nipple.  Aloe vera is very
soothing for burns/itching but shouldn't go near a baby's mouth.  Mango
is acidic and will irritate the nipple even more.  The best solution is
a little mother's milk on the nipple.  I've only found one cream made up
by a Jerusalem pharmacist to work nicely.  It is based on homeopathic
arnica and doesn't need to be washed off. I haven't found much success
with any of the usual OTC creams, vitamin drops or plain lanolin.
Israeli midwives all recommend wheat germ oil which I can't stand.  The
stuff goes rancid quickly too.

Susan Nachman-Srebrnik
Ranana (between Tel Aviv and Haifa) Israel