Autoimmune Diseases like Pemphigus
cause patchy hair loss and scaling as the immune system attacks the body's own cells.
(27 - 29) If the scalp is involved, this is called Alopecia Areata
with patchy hair loss caused by auto - antibodies reacting with the hair follicles.
Ringworm and yeast can infect the skin around the tail and cause intense itching without leaving outward signs such
as patchy hair loss.
Patchy hair loss of unknown cause seen in the Siberian Husky, Doberman Pinscher, Airedale, Boxer, Staffordshire Bull Terrier, Curly Coated Retriever, Irish Water Spaniel, and Portuguese Water Dog
Diagnosis: Clinical signs and breed are suggestive, but other causes of
patchy hair loss include bacterial demodex, or ringworm infection, or hormonal diseases such as hypothyroidism and Cushing's disease.
Thinning or
patchy hair loss at the hairline, the temples, or on the crown of the head may be an indication of low testosterone in women.
These conditions can all look very similar with symptoms such
as patchy hair loss, reddened skin, itching and sores.
The scratching can cause
patchy hair loss, redness, scabs and sores.
While not particularly serious in most cases,
the patchy hair loss associated with allergies can be disturbing.
Hyperthyroidism can result in, heart and kidney disease, high blood pressure, liver damage, weight loss,
patchy hair loss and a dull coat.
Signs include thinning hair that progresses to one - inch (2.5 centimeter),
patchy hair loss, generally on the face or the front legs.
If left untreated, chronic skin conditions including lesions, darkening of the skin,
patchy hair loss, and thickening and wrinkling of the skin can develop.
Cheyletiellosis (walking dandruff): is another common form of mange, which is usually characterized by a dorsal (on the back) distribution of redness and skin scaling with
patchy hair loss.
Dermatitis often starts with an itch - scratch - itch cycle, although sometimes it only shows up as
patchy hair loss.