I previously stated that stress signals are not calming signals because while dogs may use them to calm themselves, they don't usually have the effect of calming dogs around them. However, dogs can use calming signals in an attempt to calm themselves down when stressed. In that case they are also stress signs.
Max licks his paws when he is stressed to calm himself. He will do this when stressed even if there is no dog or person to see. (He leaves evidence in the form of missing hair on the tops of his paws.)
Like other stress signs, our dogs need us to pay attention to them and intervene.