Hello. Thanks for contacting us on healthcaremagic Laser hair reduction (LHR) is a very safe and reliable way for hair reduction. Apart from mild redness after the sitting which usually resolves in 1-2 hours, and by ice application, there are really no side effects at all if done by a well trained/experienced expert. Normally 6-8 sittings will give you a good hair reduction. The hair will become finer, the density will be greatly reduced. It is the FDA approved for hair reduction and gives long lasting results. Since you are planning to get LHR therefore, bleaching is not advisable. That is because melanin is the target chromophore for Laser used in hair removal and hence if you bleach the hair melanin which you would have already bleached out would not be there in the hair to absorb laser energy and hence hair would not be effectively removed. Threading, waxing etc is also not advisable while you are taking Laser hair reduction. Shaving is the only permissible method of hair removal while on laser. Regards