Freckles are formed due to sun exposure and thus over activation of color producing cells known as melanocytes. Laser treatment
is though effective but recurrence is a common problem, so think twice before going for laser. It is a costly procedure and mutiple sitting of 3-4 sessions may be needed. Each session lasts for around 45 minutes to 1 hour. Consult a experienced dermatologist
before going for the procedure. Mean while use a good sunscreen 3-4 times a day to prevent further darkening of freckles.