There are many reasons for dog hair loss. We only need to take care of seasonal hair loss in time. This is a natural physiological reaction of dogs and there is no need to worry too much. Pathological hair loss requires attention.

Pathological hair loss

Fungi:

Various skin diseases caused by skin molds invading the dog's skin, coat and keratin tissue of toes and claws. Make the dog scratch and lose hair.

Constant scratching, hair loss, round scaly spots;

There is also no hair loss or dandruff but there are local papules, pustules or erythematous hair loss spots or nodules.

Folliculitis:

Inflammation of skin hair follicles caused by pathogenic microorganisms. Depending on the scope of the hair follicles, clinically simple scattered folliculitis in dogs and cats. If not treated in time, the spread of inflammation will cause boils, carbuncles and pyoderma.

Mainly occurs around the lips, back, inner quadrants and lower abdomen, limbs, neck, with localized flushing and hair loss.

Mainly occurs around the lips, back, inner quadrants and lower abdomen, limbs, and neck

Localized flushing, hair loss, swelling, and many thin black spots at the roots of the hair

Demodex:

A skin parasitic disease in dogs caused by Demodex canis. Also known as canine trichocystis or canine fat mange. It is a common and stubborn skin disease. Canine Demodex mostly parasitizes in the hair follicles of the dog's eyes, ears, lips, and the hairless areas on the inside of the front legs. It rarely lives in the sebaceous glands. In severe cases, the mites can live in the dog's lymph nodes and other tissues, even in the dog's body. Insects can also be found in the ear canals and between the toes (fingers). Systemic Demodex infection is often caused due to decreased immune function.

In the early stage of infection, the affected area is hairless. In the later stage of generalized demodicosis, the hairless lesions are widely distributed and can be spread all over the body.

Usually it is localized demodicosis. In the early stage of infection, the affected area is hairless, and the skin becomes red, thickened and wrinkled

Itching, blackheads, papules and small red bumps may appear in some cases;

Pyoderma:

Purulent skin diseases caused by bacterial infections can be divided into primary and secondary types according to the cause. Dogs will scratch frequently, and there will be varying degrees of hair loss in the affected areas. Severe cases can cause skin ulcers, a foul odor, and the sores are covered with purulent secretions.

Pyoderma in young dogs: It mainly occurs in the hairless areas on the inside of the front and rear limbs, and is more common in the abdomen. Most of the symptoms are pustular rash;

​Pyoderma in adult dogs: The site of onset is uncertain, and pustular rashes, small pustules and purulent secretions can generally be seen on the skin

Eczema:

Dog eczema is a common skin disease, which refers to the inflammatory response of the epidermal cells of the dog's skin to allergenic substances. The hair in the affected area falls off, and skin injuries such as papules, erythema, scabs, blisters, and erosions appear on the skin, as well as symptoms of heat, pain, and itching.

The hair in the affected area falls off, and skin injuries such as papules, erythema, scabs, blisters, and erosions appear on the skin, as well as symptoms of heat, pain, and itching.

Acute attack: The affected area appears as punctate or erythematous eczema with different shapes, and the dog's body is itchy.

Canine scabies mite:

Scabies is an itchy parasitic skin disease of dogs, wolves and foxes. Dogs often become infected by rubbing or scratching their skin. Scabies mites parasitize in the dog's skin and bite, move, chew and pierce the skin, causing severe itching, oozing, skin desquamation, keratin hyperplasia, skin hypertrophy and hair loss in the affected area.

Scabies is an itchy parasitic skin disease of dogs, wolves and foxes. Dogs often become infected by rubbing or scratching their skin.

The disease has no strict seasonality, but the disease is more serious in the wet and cold late autumn, winter and early spring. More common in young dogs.

Seasonal shedding:

Dogs basically shed their hair in spring and autumn. Although they usually shed their hair, during the shedding period in these two seasons, dogs will shed more hair. Normally, long-haired dogs will shed more hair. Dogs shed more hair in summer than in winter. In order to regulate their body temperature, they will shed all the down they put on in winter, making the hair less and lighter.

The thick hair on the dog's body will fall out and some thin and soft coat will grow

These new hairs will not hinder the heat dissipation like the thick hair in winter, and can protect the skin well and avoid skin damage

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