ST. PETERSBURG, Fla. -

Cheri Kovacsev's face is dripping with blood, and she wouldn't have it any other way.

"I'm hoping to achieve smaller pores, [and] the fine lines around my lips to improve over this process," Kovacsev said.

Licensed paramedical aesthetician Amaris Centofanti performs rejuvapen micro-needling.

"After you are done with the treatment, collagen elastin kicks in to heal the skin, so in a few days, your skin starts to look more flawless," Centofanti said.

People like the professor of dermatology, Dr. James Spencer, however, aren't sold on micro-needling, which costs about $350 a pop.

"There was just a study in the Journal of the American Medical Association Dermatology, JAMA Dermatology, last month, of three cases of allergy to the medication to the serum that was put on after micro-needling," Spencer said.

Some other extreme beauty treatments include the bee venom facial. The theory is the venom tightens skin by pumping up collagen. It costs about $130.

Then there is the vampire face-lift, which costs about $600 to $800. For this treatment, plasma is taken from your blood and injected back into your skin.

The placenta facial uses stem cells from a sheeps placenta to boost collagen.

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Health Beat: Extreme skin