Can fungus be the cause for itchiness all over body especially arms and head with no signs of hive redness or dandruff tingly feeling and itch tests?

Generalized pruritus: Pruritus, or itch, is defined as an unpleasant sensation that provokes the desire to scratch. Certain systemic diseases have long been known to cause pruritus that ranges in intensity from a mild annoyance to an intractable, disabling condition. Generalized pruritus:renal pruritus, cholestatic pruritus, hematologic pruritus, endocrine pruritus, pruritus related to malignancy, and idiopathic.