The salve helps and she can already tell, smoothing over patches of skin that were rough and red and chafing against her clothing despite how soft and worn and threadbare they are. It's almost as good as the burn cream Haymitch sent during the Games, and Katniss lets out a little bit of a sigh at the coolness of it against her skin and knows that she should probably say thank you or a similar sentiment to that but just can't quite get the words out.