Hair reduction is an excellent method for permanent hair reduction. But it is rarely 100% results. Depending on th hair growth (color of hair, thickness of hair), the results can vary from 75% to 95%..
The darker and coarser the hair, better the results. Typically areas like upper lip
, under arms, lower legs and bikini respond the best to Laser Hair reduction.
It takes approx between 6 - 10 sessions for a good result depending on area being treated, skin & hair type.
Post laser, it typically takes up to 2 weeks for the treated hair to shed or cast. Since it has been 9 days only, I would advise that you wait for a week and then go back to your laser centre for a touch up or missed patch touch up. They can try treating only hairs that have not casted.
The hair cast also depends on the area you are having treated. Facial hairs cast faster than body hairs.