A lady I work with soaked her feet in hot water with a half cup or borax, and had a lifelong case of chicken skin resolve. Her chronic high blood pressure was also in the normal range the next morning.
I had reccomended the borax soak to her for a case of athlete's foot.
While this is a single annecdotal example, it may be something you might try relatively inexpensively. You might disolve some borax in some water and apply it directly to the affected area as an alternative, and see if it helps you.