Dryness is caused by your environment and, well, how dry it is. Here in Denver, dryness is a big issue. Dry skin, irritated nasal passages, and dry cough are common complaints. These issues all involve dryness in the Lung system, which also includes the skin in TCM. The Lung is partnered up with the Large Intestine, so dryness can even cause constipation in some people. Traditionally, dryness is said to be worst in Autumn, which is also the season that many of these foods are harvested. Nature provides what we need, when we need it.
The following foods are considered to be moistening and lubricating, and can counteract the affects of dryness.
Soy products: tofu, tempeh, soy milk
pear, apple, persimmon
almonds, peanut, sesame seed, avocado
herring, crab, oyster
Evening Primrose or Borage Oil Supplements are excellent for dry skin
cannabis (even edible products are drying)
warming and aromatic spices and herbs