thanks for posting your query.
whaat you might be having following the bleach cream are not scars
but maybe pigmentation.
your skin has reacted to the bleach cream.
make sure you wash it off thoroughly.
also application of cortisone
cream twice a day for a week will calm the skin down.
it may take upto 2 weeks to recover, in case the pigmentation is excessive you may need to be started on oral medications for which you will have to visit your doctor.
if you take proper treatment in time, permenant effects can be avoided.