Hi Doctor If I'm Going To Have Laser Treatment For

Hi Doctor
If I'm going to have laser treatment for black dots in face , what are the precautions that I should know for the period after treatment ?
and should I avoid sun exposure totally ??
as I'm a radiology resident and it is difficult for me to stay at home for a long period , so what are the precautions If I should expose to sun after the laser treatment ?
thanks in advance