After undergoing a skin whitening treatment, wash the concerned area with chemical free soaps and dab very gently. For a quick and complete recovery, it is advised that you make use of certain maintenance products such as regularly apply aloe vera gel or petroleum jelly to give a soothing and cooling effect. Take painkillers to is there's any swelling. You should apply sunscreen for at least a period of six months to prevent darkening or sunburn because the skin at this stage becomes extremely sensitive.