Originally Posted by unis
the possibility of this is that it is having friction from your pants or there is always constant pressure in the area when yous it for long time most specially when its cold and skin tends to dry...
try apply moisturinzing cream it would be better to apply one with whitening properties so that to whiten the area that has become dark due to this...
then try to put pillow to your seat whenever you gonna need to seat, also try avoiding thight clothes... this is very commoin to asians too and those skin which has huigh melanin. and those who is over weight due to friction.