In chinese medicine, Autumn is about the Lungs. In particular the Lung is said to extract qi (or energy) from the air we breathe and uses it to nourish our internal processes.
What this means for us is that we might begin to feel as if we are drying out. Lips and skin may seem drier and itchier than usual, or you might even find you've suddenly developed a dry cough.
The key is to stay well hydrated and focus on eating plenty of seasonal vegetables and fruit such as sweet potatoes, carrots, pumpkins, pears and apples. Eat less salads but include more soups and try steaming foods to preserve their moisture content.