Alopecia X is a fairly common coat disorder in Pomeranians and other double coated breeds. It is sometimes called “Black skin disease” as often the hair loss is followed by darkened skin.
What it looks like in real life
Most owners notice some combination of:
1. Gradual coat thinning that becomes a bald patches
Hair loss is usually slow, non itchy, and symmetrical. It often starts on the neck, trunk, back end, and the “friction zones” where harnesses sit. The face and lower legs are often less affected.
2. Skin looks darker in the bald areas
Hyperpigmentation is common (or a blackening of the skin). The skin is usually not inflamed unless there is a secondary infection.
3. The coat changes texture before it disappears
Owners often describe a dull, dry, woolly coat. Some Pomeranians also have hair shaft fragility, meaning the hairs break more easily, which can make the coat look moth eaten even before true baldness actually appears.
Who tends to get it?
Pomeranians are one of the classic predisposed breeds. Many cases begin in young to middle aged dogs, and some studies and reviews describe a male bias, particularly in earlier onset cases. However, Alopecia X can occur in any sex.
A newer Pomeranian specific study looked at phenotypic indicators linked with the development of Alopecia X, supporting that there are measurable risk patterns within the breed even if we do not yet have a single confirmed cause.
What is actually happening in the skin
The simple version
Your Pom’s hair follicles stop cycling properly. Instead of growing new healthy guard hairs and undercoat, the follicles get “stuck” in a resting phase. That is why the condition is also described as “hair cycle arrest”.
The more scientific version
Across studies and dermatology reviews, the dominant theme is that Alopecia X is not a straightforward hormone deficiency. It is more likely a complex problem involving hair follicle cycling control, local hormone signalling at the follicle, and steroid metabolism in the skin. In other words, blood tests can look normal while the follicle micro environment is behaving differently.
Some research has explored adrenal and sex hormone pathways, including “intermediate” adrenal steroid hormones, and whether changing hormonal signalling affects regrowth.
What it is not
This is where a lot of owners lose time and money, because many causes of hair loss look similar from a distance.
Alopecia X is a diagnosis of exclusion. What this means is that your vet ideally rules out other common causes first, especially those that are treatable or contagious.
Common things your vet will check for
- Parasites- ie demodex mites
- Ringworm- Dermatophyte infection
- Bacterial/ yeast skin infection
- Allergic skin disease with self trauma (scratching, biting)
- Hypothyroidism
- Cushing’s disease (hyperadrenocorticism)
- Pattern baldness, follicular dysplasias, post shaving alopecia, and other non inflammatory alopecias
How is Alopecia X diagnosed?
Step 1. History and pattern recognition
Your vet or a dermatologist will look at the age it started, the symmetry of the hair loss, itch level, if there is any skin inflammation, a full grooming and clipping history, and breed pattern.
Step 2. Basic skin tests
These often include cytology, skin scrapings, and fungal testing depending on the presentation.
Step 3. Endocrine screening when appropriate
Bloodwork and endocrine testing is often done to rule out hypothyroidism and Cushing’s disease, because the clinical patterns of these can overlap with hair loss patterns in Black Skin Disease.
Step 4. Skin biopsies
Having a biiopsy done can support the diagnosis and rule out other follicular disorders. Histopathology in Alopecia X often aligns with hair cycle arrest type changes.
Some dogs regrow hair at biopsy sites, therefore observation is part of why techniques that “wake up” follicles through controlled skin stimulation have been discussed in clinical settings.
Treatment options
There is no single guaranteed cure, and response varies. Many treatments aim to restart follicle cycling.
1. Melatonin
Melatonin is one of the most commonly used options because it is relatively accessible and generally well tolerated under veterinary guidance.
Evidence highlights:
In a clinical study of dogs with hair cycle arrest, a majority showed partial to complete regrowth during melatonin treatment, and researchers examined whether regrowth correlated with adrenal sex hormone levels.
Other work explored changes at the follicle receptor level, including oestrogen receptor expression, in Pomeranians treated with melatonin.
A more recent controlled clinical study also supports that melatonin can stimulate hair regrowth in dogs with alopecia conditions including Alopecia/ Black Skin Disease.
2. Neutering in intact dogs
Some intact dogs improve after neutering, which fits the theory that sex hormone signalling can be involved in at least a subset of cases. The effect is not universal, but it is often discussed as a reasonable early step if the dog is intact and not intended for breeding.
3. Treatment paths that target steroid pathways
Some dermatology literature discusses therapies aimed at adrenal steroid pathways, including older protocols that investigated drugs such as mitotane in selected cases, as part of the broader hair cycle arrest research context. These are specialist decisions due to side effect risk and monitoring requirements.
4. Physical follicle stimulation approaches
Because some dogs regrow hair in areas of skin injury or inflammation, controlled stimulation has been discussed, but results are variable and it should be done only with veterinary direction to avoid scarring or infection.
5. Supportive skin and coat care
Supportive care will not usually “fix” Alopecia X alone, but it can reduce secondary problems and help the skin barrier.
Common supportive steps include:
Gentle cleansing routines, antiseptic or antifungal protocols if infections occur, moisturising approaches for dry skin, and managing friction from harnesses and clothing.
Air pollution, busy urban walking routes, and winter clothing friction can increase irritation and secondary infection risk even when the primary condition is non inflammatory.
Prognosis
Alopecia X is usually a cosmetic condition, not a life limiting disease. Many dogs feel completely normal. The biggest quality of life risks come from secondary skin infections, over treatment, or missed underlying diagnoses like endocrine disease.
Regrowth can happen, but it can also relapse. Some dogs cycle between better and worse periods.
When you should escalate quickly
Contact your vet promptly if you see:
- Itch, redness, smell, greasy coat, or pustules
- Hair loss plus lethargy, increased thirst, appetite changes, or weight changes
- Rapid hair loss rather than gradual thinning
- Other pets or humans in the home developing suspicious skin lesions, because that raises concern for contagious causes such as ringworm
Next Steps for Pomeranians Owners
- Book a vet appointment and bring dated photos
- Ask for a structured rule out plan, not a grab bag of supplements
- Consider referral to a veterinary dermatologist if the basics are negative
- Discuss melatonin and other options based on your dog’s sex, age, health history, and test results