The longevity of results depends on the problem being managed:
a. Removal of specific lesions such as sun spots tend to be permanent once removed properly. Excessive sun exposure can lead to recurrence, so proper skin care is advised.
b. Scar treatment is largely permanent, with improvement of scars maintained for many years after a series of proper scar treatments.
c. Melasma is a chronic and largely incurable condition; treatments are performed at weekly intervals for 4-6 sessions and subsequently maintained at less regular intervals if the skin is well maintained on topical therapy.
d. Tattoo removal is permanent and better results are seen after each session.