Reasons for skin diseases in dogs

Posted on October 08 2018

Reasons for skin diseases in dogs

Dogs can suffer from different skin diseases. Whatever the nature, early diagnosis and treatment can effectively deal with it and allow the dog to not suffer the consequences on his health and well-being.

Diseases affecting the dog 's skin constitute almost one - third of veterinary consultations . They are therefore quite frequent, which is not really surprising when we know that the skin is an organ particularly exposed to external aggressions and that the balance of its natural structure is extremely fragile .

The skin conditions are very varied. Their levels of gravity also. Some treatments exist for most of these dermatoses, but they must be applied as soon as possible so that their efficiency is optimized.

Parasitic diseases

Various skin parasites such as fleas, lice and ringworms can cause skin lesions , often resulting in itching and marked areas.

This is the case, for example, of the canine demodecia produced by the infestation of the hair follicles of the animal by Demodex canis , a microscopic mite. This elongated parasite is most common in young dogs (between 3 and 12 months), while others can be carriers without showing clinical signs. Older dogs are not immune to canine demodicosis when they have a deficiency in their immune system. This disease causes hair loss on more or less extensive areas of the dog's body. Its treatment may consist of taking active tablets, acaricide baths or pipettes.

Another parasitic skin disease is ringworm caused by dermatophytes , fungi belonging to the species Microsporum canis and Trichophyton mentagrophytes. It results in circular lesions devoid of hair and is generally accompanied by itching only in its evolved forms. Oral antifungal medications (azoles) and antifungal shampoos are among the main treatments for ringworm. In the most affected dogs, mowing may be necessary.

Bacterial dermatoses

Some skin diseases can also be of bacterial origin . One of the most common bacteria is Staphylococcus pseudintermedius . She is responsible for many localized or extensive pyoderma . The treatments for these pyodermites are based on the action of antibiotics combined with that of antiseptic or emollient shampoos.


As in humans, canine seborrhea is an excess of sebum on the skin. It can be dry , giving the skin and coat a waxy appearance, or oily , making them oily and sticky, in addition to producing an unpleasant odor. Seborrhea often gives rise to the appearance of dandruff , without necessarily accompanied by pruritus (itching).

The allergies

In the same way that it occurs in humans, the allergy can also affect the dog in the skin. The animal can, in fact, be allergic to a variety of substances and natural or synthetic materials: it goes from the plant to the plastic, through a cleaning product and some drugs.

Skin tumors

More or less large nodules , growths and other plaques may be the characteristic manifestations of cutaneous tumors . They are produced by excessive multiplications of tumor cells and can undergo a considerable evolution.

All tumors are not malignant , but they must be removed as soon as possible to preserve the health of the dog. The surgical removal of the tumor mass remains the main measure to take.

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