Changes

===Pathology===

===Pathology===

Grossly:

Grossly, papular dermatitis is seen in combination with any of crusting, erythema, alopecia, excoriations, hyperpigmentation or lichenification. Microscopically, flea allergic dermatitis presents as a hyperplastic superficial perivascular dermatitis. Oedema may be seen, together with an influx of mast cells, eosinophils, lymphocytes and histiocytes.

**Hyperplastic superficial  perivascular dermatitis

**Oedema, [[Mast Cells|mast  cells]], [[Basophils|basophils]], [[Eosinophils|eosinophils]],   [[Lymphocytes|lymphocytes]], histiocytes

**Fibropruritic  nodules  covered by hyperplastic epidermis

 

 

**Hyperplastic  superficial  

perivascular dermatitis

**Oedema, [[Mast  Cells|mast cells]],

[[Basophils|basophils]], [[Eosinophils|eosinophils]],  

[[Lymphocytes|lymphocytes]],  histiocytes

==Treatment==

==Treatment==