Petechiae

So... those little purple dots on my leg... anyone know anything about them?  They're under the skin, they don't itch and neither does any part of me.  The only  thing that has changed for my legs recently is I'm beginning ballet.  Could they be exercise related?

All thoughts welcome.  Thank you!

If it really is petechiae you should talk to your doctor as it can be symptomatic of other conditions.  

Please go see a doctor.  Petechiae can be a sign of many diseases/illnesses, some of which have no other symptoms besides the rash.  I'm a medical student, so I'm not a doctor yet, but I do know that you should have it checked out.

Update:  Thanks for the responses.  Doc says it's probably related to some hard-core itching I had last week or so after switching detergent, but I'm to keep an eye out for it and I'm to run, not walk, in if they show back up.

Good, I'm glad you got it checked out!