What causes Eosinophilic fasciitis?
The cause of eosinophilic fasciitis is unknown. Fewer than 300 cases have been reported in the past 35 years.
People with this condition have a buildup of eosinophils, a type of white blood cell, in the affected fascia and muscles. Eosinophils are related to allergic reactions, but their exact function is unknown. </s>