Generally, you can expect visible improvements of about 50% - 90%, depending on the type and severity. Having said that, if you have an extremely severe case of pigmentation, you are encouraged to maintain your expectation and not to expect completely clear, smooth skin after the treatment program. Do talk to your physician in-charge because compliance to their instructions is very crucial to getting the best results.
Depending on the extent of your pigmentation and the treatment level of your sessions, you may need anywhere from 5 to 8 sessions. The treatment may be repeated every 1 to 4 weeks, depending on the type, extent and severity of your pigmentation.
For Hyper-pigmentation, there is mild flushing of the treated area which usually resolves after a few hours. More obvious localized redness lasting a few days may occur with intensive spot treatments for more resistant pigmentation.
Contrary to a lot of beliefs, Pico Laser session is actually very comfortable. To reduce any sensation, a numbing cream can be applied on the skin prior to the laser session. It feels like a warm and gentle pricking sensation on the skin.