The only way to know what you have is to see a doctor. You might have a staph infection that might require antibiotics.
Its impossible for us to diagnose you on the internet. If money is an issue, go to an std clinic or Planned Parenthood if you are in the US.
Aj
i checked the site but it doesnt really look like that but thank you for helping
its on my upper thigh area, and if its just blister how can I get rid of them?
It might be Molluscum Contangiosum go to www.Molluscum.com
They could be just blisters. Upper legs is not an STD.