Without a photo it is difficult to advise you but you should immediately let your treating physician know, so that they can work with you on any potential side effects.
After getting a upper lip laser hair removal treatment I have a purple mark; is it a bruise?
Doctor Answers 3
Laser Hair Removal upper lip
Purple spot after Laser Hair Removal
Laser hair removal and bruising
Bruising is not usually seen with laser hair removal -- but in area of thin skin it can be possible. Icing the area before and after your treatment may help reduce the bruising. Good luck!