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Otitis externa is inflammation of the outer ear canal. What is the cause?There are many primary causes of otitis externa including :* Allergies* Atopy - one of the commonest causes of otitis externa* Food hypersensitivity (80% of affected cats and dogs reported to have otitis) * Contact hypersensitivity* Autoimmune disorders* Pemphigus foliaceous* Diseases of glands in the skin* Hyperplasia of glands reported in Cocker Spaniels* Foreign objects in the ear canal* Grass awns* Excessive hair* Sand, soil, water* Fungi* Dermatophytes * Generalised diseases of keratinisation* Primary idiopathic seborrhoea* Hormonal disorders - hypothyroidism, sex hormone imbalances* Parasites* Ear mites (eg otodectes...

Podogermatitis affects the skin webs between the toes and between the foot pads.  It's a general terms for several different skin disorders.  It will result in redness, inflammation, swelling, and sometimes discharging sinuses.  Usually the underlying cause is unknown.   What causes podogermatitis? Sometimes the cause can be identified, but many times there is no known cause.  Here are some list of causes: Most cases are idiopathic meaning unknown Foreign object penetrates into the skin like grass, splinters of wood, thorns Foreign material collected against the skin like gravel, sand, tar, walking in freshly laid grass, chemicals Trauma like cuts,...