I need help, I need to know how to whiten underarm, my b-day is commin and its not good if I just going to wear a w/sleeves on... help me thanks

Do you shave or wax?

Waxing is better and use some lightening cream on that place.

Well never shave as it makes underarms dark skinned... always opt shaving and regarding the dark color.. well you can use some face packs like besan + lemon + yoghurt...