Brown spots on skin that opens and oozes blood. What should I do?

I noticed there are small (2-3 mm) circular brownish spots on my forearm in between my elbow and shoulder that ooze blood. Only some of them open up and blood comes out. Does anybody have an idea of what this can be?

Any brownish spot that oozes blood should be shown to a doctor,who may refer you to a dermatologist for a biopsy. Do see your doctor ASAP. They may be nothing but better to be safe with a proper diagnosis.