I have residual red streaks that are sometimes visible (after shower) on my abdomen 6 months after using clothes steamer on dress i was wearing.it didn't hurt much at the time and didn't blister.when will these disappear & what can i do to help fade?

First degree burns can cause some hyper or hypo pigmentation in the skin as it heals. Warm water can cause vasodilation of the skin which would then cause areas of irregular pigmentation to show up more clearly. It seems as though you are seeing the "scarring" caused by the steamer burns. Care of healing burns involves using scar ointment, keeping the area moist and taking a collagen supplement.