Skin Tag Removal - Treatment (Liquid Nitrogen)Freeze Pen (Liquid Nitrogen) This is a cryotherapy treatment to remove skin tags and sunspots. Liquid Nitrogen is applied to the skin tag or sunspot for few seconds to freeze and destroy the affected skin cells. 5 20min can be added when having another treatment, if required. R85 per tag (depending on the number, in which case the price would be reduced) This is a treatment done in the salon, NOT the sale of the pen.