I have what i've always called a blood mole. its tiny & doesn't cause issues but im curious why it exists. i know it is blood since i pricked it once.?

Genetics: Sounds like you are describing a cheery angioma- which are associated with family history of having these... Are usualjy always benign and develop as we age. I have a few too! welcome to the club! :).

Probably benign but: Although this is likely benign, any new lesion or change to existing lesions should be checked; squamous cell carcinoma, a treatable skin cancer, is often described as a sore or pimple that doesn't heal, and can bleed easily.

Hemangioma: Is the technical name for a collection of small vessels that will bleed when pricked . It can be cured by a laser and is harmless. Usually people have several and tend to get more as they age and do not turn into cancer.