I Have a Possible Remedy.
If you believe in alternative medicine, then follow this. If not, you don't have to. Its just a suggestion.
There are 12 tissue salts in homeopathic medicine. They say these salts are found in every cell in the body and when the balance of any one salt is disturbed, the body shows symptoms of sickness.
One cell salt, nat mur (sodium chloride) is responsible for distribution of water throughout the body. Lack of this salt leads to over dry skin in some parts of the body. Also another symptom is a craving for salty foods.
Nat mur is available in health food stores. Costs under $10 and is worth a try.
No possible side effect and a possible cure for your problem.
Good luck....
If you do try it and it works, let me know....