Fluid intake and output should be monitored and the patient should be weighed daily. Many cases of mumps have no visible symptoms. The parotid glands, on the side of the face, are more frequently involved. The inflammation occurs when eosinophils, a type of white blood cell, infiltrate the fibrous layer surrounding the muscle, and the muscle itself. This picture shows what is called pitting edema, associated with eosinophilic fasciitis, which is characterized by a dent that remains in the skin after finger pressure.
Pitting edema occurs when fluid collects in the tissue.
By pressing a thumb or finger firmly against the tissue for a few seconds, a dent can be produced. When the finger is withdrawn the dent may persist for several minutes.