This should not be viewed as recurrence of the treated vessels. The skin will continue to age after the procedure is performed. Proper skin care and sun protection with sunscreens will help protect your skin from the aging affects of the sun, which include the formation of new blood vessels in the skin. You should use sunscreens on a continuous daily basis. The number of treatments required can not be predicted in advance.
Every patient is different and responds differently to the laser treatments.
The number of treatments also depends on the type of lesions being treated. Some lesions require only one treatment and others three or more treatments. As a rule, treatment of leg veins requires 1-3 treatment sessions for a given area. Facial veins and telangiectases are often significantly improved in 1-2 sessions. Treatment of birthmarks and scars usually require multiple treatments.