If you end up with hanger marks, there are a few ways to get rid of them.
Spritz water: You can easily remove hanger bumps by spritzing the shoulders of the garment with clean water. Put on the garment while it’s still damp, and let your body heat relax the fibers into the proper place.
Hairdryer: Spritz the shoulders with water. Then use a hairdryer to dry the area while using your fingers to flatten the bumps.
Ice cube: Grab an ice cube from the freezer and run it over the bumps to flatten them.
Steam it: Use your garment steamer to smooth out the bumps. Hold it about six inches away from the shoulders and let the steam relax the fibers and work out the creases.