hi.Thanks for the query.
can be reduced by the following steps:
1) Avoid Friction: you should avoid any rubbing or scrubbing of the affected areas .Skin should be very mildly patted dry after bath.
2) Sunscreen: Use broad spectrum sunscreens even at home and repeat after 4-5 hours.
3) Chemical peels: Glycolic peels (50-70% ) or Tri-chloro acetic acid
peels ( 15-20 % ) for multiple sessions every 2-3 weeks.
The above when combined , should lighten the pigmentation to some extent.It might not go away completely although.macular amyloidosis is a deeper fort of pigmentation and it takes several months to achieve a good improvement.
Hope this helps..take care!