What Are These Blood Blisters? Are They Dangerous?
Unfortunately, TeenHealthFX cannot diagnose over the internet. Based on the information you provided it sounds like they might be Cherry Angiomas, however, it is important to see a doctor to know for sure.
Healthline explains that Cherry Angiomas can pop up anywhere on the body and do look like tiny blood blisters. In fact, there is a genetic component to them so if a family member has them you will most likely get them too. They usually are not a cause of concern unless they change shape, color, or size. In addition, if they bleed, bother you or hurt you then it would be necessary to have a doctor check them out.
Most people who have them do not require medical attention or need to do anything about them. We understand that they can be annoying, but unless specified by a doctor are usually harmless.