popped blood vessels...??

hello, i'm really hoping some one here can help. I am 15 and slim and active for my age. Today i've recently discovered popped blood vessels on my under arms and on my chest. should i be concerned?? i've had them on my face before...so i know they'll go away. they will go away..right? please help!!
- aly

[Vanessa Lacuesta]

Hi

These may be purpura or petechie. These are reddish small spots. Petechiae may be significant since their presence may be due to underlying vascular problems such as decrease in platelet count. You have mentioned of having this before. If this is the case, I would think this may be milia or a sweat rash. You have been physically active and the rash appears in covered areas of the body such as the armpits and the chest. Keep the area dry. Change clothes after exercising. Sweat rash may be aggravated by heat and excessive sweating.