If she is athletic then no, an athletic person will sweat more often to cool their body because they will work harder, so it is natural IF she is athletic. If not then I do not know.

Find something to do that interests you or carry something on your person that can keep you entertained and keep you from getting down such as an ipod, mp3 player, gameboy, psp, cell phone, etc. Another way is to remain positive and think about the upside and why you should be motivated about what you … Read more

My guess would be that he/she either ingested something that caused him/her to become sick and his/her body is trying to expel it and either can't or has already and isn't getting the signal to stop, or he/she has some form of virus or bacteria infection that is causing it.

I would say that not enough blood is flowing to it, causing the discoloration.