Plasma Needles are considered disposable items; they naturally get dull over time. If not replaced after each treatment session, you may feel more intense discomfort during the session, or potentially expose yourself to an increased risk of scarring and infections.  The Plasma Fine needles are clinically prepared and designed for one session only; you may use the same needle for multiple areas and blemishes within the same treatment session. The Plasma Coarse needles may be used multiples times for up to one month with proper sanitation and disinfection. Please be advised; if you feel any increased discomfort, or if the needle(s) doesn’t generate a plasma arc, replace it immediately.  Additional needles can be bought anytime here: https://dermavel.com/products/dermavel-repair-pack