There is no known way to prevent the disorder. Avoiding environmental irritants and other aggravating factors may reduce the severity of symptoms in people who have nummular eczema. Nummular eczema is diagnosed based on the appearance of the skin and on personal and family history. The health care provider should be consulted for diagnosis of nummular eczema, as it can be difficult to differentiate from other skin disorders. Treatment should be guided by the health care provider.
Treatment is focused on relief of the symptoms.
Anything that aggravates the symptoms is avoided whenever possible. Frequent bathing and eating foods rich in bromides or iodides is not advised. Other possible allergens are avoided, including foods and environmental irritants such as wool and lanolin. Dry skin often makes the condition worse, so bathing and the use of soaps may be reduced. Temperature changes and stress may cause sweating and changes in the blood vessels of the skin, also aggravating the condition.