Armpits are showing up with dark spots? help!

Those are called Bruises. Daddy's been bad to you, hasn't he? I would say show us on the doll where he touched you, but that's obvious isn't it?

You need to see a doctor.

Yeah is tht you are going to turn black

My bf has that it's normal unless there's something I don't know like it's diabetes

^^^ never did this person say that they were a girl.

Oh yeah Eore.. Because her dad is so touching her armpits..?! -_-

This could be a lot of things, so definitely be a doctor.
It could be sling darkening (in which lemon juice then sun exposure would help), but it could also be a sign of something serious.
Please get it checked...

See your doctor asap. You may have insulin/diabetic issues.

http://www.dermadoctor.com/article_Diabetic-Skincare_231.html

Acanthosis Nigricans

Acanthosis nigricans consists of velvety brown thickened patches commonly found under the arms but may also arise along the neck and flexures. Patients note areas of skin discoloration then followed by a thickening of the skin.

While there are several types of acanthosis nigricans, one form due to insulin resistance seen in noninsulin-dependent diabetics does exist. This lack of response to insulin results in increased levels of the hormone. It is thought that the higher levels of circulating insulin actually triggers skin cell growth factor receptors resulting in cell reproduction. While eradication of this condition is difficult, weight reduction and reducing carbohydrate and sugar intake may play a role in therapy by helping reduce insulin resistance. For troublesome darkness, patients can try thinning the areas with a retinoid such as prescription Tazorac Cream or Retin A and then trying a bleaching agent. Use products carefully. Too much irritation may increase skin discoloration. Stick with a gentle, fragrance-free underarm antiperspirant such as DERMAdoctor Total NonScents Ultra-Gentle Antiperspirant or DERMAdoctor Total NonScents Ultra-Gentle Brightening Antiperspirant.

I do think it sounds like bruising too which can possibly be a medical issue. Maybe see a doctor? But for now, I would just leave them alone and let them heal. Doing all sorts of crap to it will probably just make it worse.