Eczema - nummular; Nummular dermatitis
There is no known way to prevent the disorder. You should avoid things that are known to make your symptoms worse.
Habif TP. Clinical Dermatology. 4th ed. St. Louis, Mo: Mosby; 2004.
Noble J. Textbook of Primary Care Medicine. 3rd ed. St. Louis, Mo: Mosby; 2001.