Understanding Feline Apocrine Hidrocystomas

Published: July 20, 2025

When your Persian cat develops distinctive black rings around their eyes, it can be both concerning and confusing. Here's everything we've learned about feline apocrine hidrocystomas during our journey with our Persian cat, Bombom.


What Are Those Black Rings Around My Cat's Eyes?

If you're here because you've noticed dark, fluid-filled bumps around your cat's eyelids, you're not alone. Those distinctive rings are likely feline apocrine hidrocystomas. A mouthful of a medical term that simply describes benign cysts that develop from the sweat glands in your cat's eyelids.

When we first noticed these developing around Bombom's eyes in 2019, I felt completely isolated. Despite extensive searching, I found mostly scientific literature and very few real-world experiences from other cat parents. This guide aims to bridge that gap by combining medical information with practical, lived experience.


Understanding Feline Apocrine Hidrocystomas

What Exactly Are They?

Feline apocrine hidrocystomas are non-cancerous, fluid-filled cysts that arise from the apocrine sweat glands located in a cat's eyelids. Think of them as small, benign bumps that contain fluid rather than solid material.


Key characteristics:

  • Round, fluid-filled bumps
  • Usually dark or pigmented in appearance
  • Located on the eyelid margins
  • Benign (non-cancerous)
  • Can grow slowly over time

Which Cats Are Most Affected?

While any cat can potentially develop these cysts, certain breeds show a much higher predisposition.

Most commonly affected breeds:

  • Persian cats --> significantly higher risk
  • Himalayan cats --> also at elevated risk
  • Middle-aged to older cats --> typically seen in cats 5+ years old

Important note: Even within these high-risk breeds, the condition remains relatively rare. Most Persian cats will never develop these cysts, so if your cat does, you've simply drawn the short straw genetically speaking.


Our Journey: From Discovery to Acceptance

The Initial Discovery (2019)

When we first noticed the dark bumps forming around Bombom's eyes, my immediate reaction was concern. Like most pet parents, I turned to Google, which led me down a rabbit hole of medical terminology and worst-case scenarios.

The lack of real owner experiences was frustrating. I found plenty of veterinary literature, but what I really wanted was to hear from someone who had actually been through this with their cat.


The Veterinary Consultation

Our veterinary ophthalmologist was able to diagnose the condition immediately upon examination. In many cases, the distinctive appearance and location make the diagnosis straightforward for experienced professionals.

The diagnostic process typically includes:

  • Comprehensive eye examination
  • Sometimes fine-needle aspiration to sample the fluid
  • Ruling out other potential conditions
  • Discussion of treatment options

In Bombom's case, no sampling was needed. The specialist knew exactly what we were dealing with at first glance.


Treatment Options: What's Available?

One of the most important things to understand is that treatment for feline apocrine hidrocystomas is often optional. Unless the cysts are causing irritation, vision problems, or other complications, treatment is primarily cosmetic. We highly encourage leaving the cysts alone if they are not causing any issues with your cat's well-being.


Non-Surgical Treatment Options

  1. Aspiration
    What it involves: Draining the fluid from the cyst using a needle
    Pros: Minimally invasive, quick procedure
    Cons: Cysts frequently refill, making this a temporary solution
    Best for: Small cysts or as a temporary measure if there is an immediate emergency.
  2. Chemical Ablation (TCA Injection)
    What it involves: Injecting 20% Trichloroacetic Acid to destroy the cyst lining
    Success rates: Studies from Brazil showed no recurrence after two years
    Pros: Effective long-term solution without surgery
    Cons: Requires precise technique and expertise
  3. Cryotherapy
    What it involves: Using controlled freezing to destroy cyst cells
    Pros: Minimal scarring, effective results
    Cons: Specialized equipment needed, potential for temporary discomfort
  4. CO₂ Laser Ablation
    What it involves: Using laser energy to vaporize the cyst tissue
    Pros: Precise, no cutting required, minimal bleeding
    Cons: Requires specialized equipment and expertise
  5. Electrocautery
    What it involves: Using electrical current to burn the cyst lining
    Pros: Prevents refilling by destroying the secreting cells
    Cons: Potential for scarring if not performed carefully

Surgical Treatment

Surgical Excision

  • What it involves: Completely removing the cyst and suturing the eyelid
  • Pros: Usually curative, definitive treatment
  • Cons: Most invasive option, requires general anesthesia, potential complications

Post-treatment care for any intervention typically includes:

  • Antibiotic therapy
  • Pain management
  • Elizabethan collar (cone) to prevent scratching
  • Follow-up appointments
  • Monitoring for complications

The Reality of Treatment: Real Owner Experiences

This is where real-world experience becomes invaluable. When I reached out to Persian cat health groups seeking advice, I discovered something surprising: most owners who had pursued treatment regretted their decision.


What Other Cat Parents Told Me

The treatment experience:

  • Recovery was often harsher than expected
  • Some owners genuinely regretted putting their cats through the process
  • Cats who lived with the condition untreated were generally just as happy and comfortable

The monitoring approach:

  • Other owners ultimately decided against treatment
  • Their cats lived normal, happy lives with the cysts
  • No impact on quality of life when cysts weren't causing irritation

This feedback was honestly more valuable than all the medical literature I had read. It provided the real-world context that scientific papers simply can't offer.


Our Decision: Why We Chose Not to Treat

After extensive research and consultation, we decided against treating Bombom's cysts.

Medical perspective:

  • The cysts weren't causing him any discomfort
  • No vision impairment
  • No signs of irritation or infection
  • Purely cosmetic issue

Quality of life consideration:

  • Bombom shows no awareness or concern about his appearance
  • He's comfortable and happy
  • The cysts don't interfere with his daily activities

Risk-benefit analysis:

  • Treatment risks outweighed cosmetic benefits
  • Potential for complications or recurrence
  • Unnecessary stress for a purely aesthetic concern

Living with Feline Apocrine Hidrocystomas

Here's what you can expect if you choose the monitoring approach.

Progression:

  • Cysts may continue to grow slowly over time
  • New cysts can potentially appear
  • Changes are usually gradual

Monitoring:

  • Regular veterinary check-ups
  • Watch for signs of irritation or infection
  • Note any sudden changes in size or appearance

Quality of life:

  • Most cats are completely unaffected
  • No dietary or lifestyle restrictions needed
  • Normal lifespan and health expected

When Treatment Becomes Necessary

While many cats live comfortably with these cysts, treatment should be considered if:

  • Cysts are causing obvious irritation
  • Interfering with normal blinking or eye function
  • Signs of infection develop
  • Rapid growth or changes in appearance
  • Your cat shows signs of discomfort

Busting Common Myths
  1. Myth: "These cysts are contagious"
    Truth: Feline apocrine hidrocystomas are not contagious. They develop due to genetic predisposition, not infection.
  2. Myth: "They'll go away on their own"
    Truth: These cysts do not resolve without intervention. They typically remain stable or grow slowly over time.
  3. Myth: "All Persian cats will develop them"
    Truth: While Persians are at higher risk, the condition remains relatively uncommon even within the breed.
  4. Myth: "Treatment is always necessary"
    Truth: Treatment is often optional and primarily cosmetic unless the cysts are causing functional problems.

Supporting Your Cat Through the Journey

Regular monitoring:

  • Take photos to track changes over time
  • Note any behavioral changes
  • Maintain regular veterinary relationships

Creating a support network:

  • Connect with breed-specific health groups
  • Share experiences with other cat parents
  • Don't hesitate to seek second opinions

Emotional considerations:

  • Remember that your cat doesn't share human aesthetic concerns
  • Focus on comfort and quality of life
  • Trust your instincts about your pet's wellbeing

The Importance of Professional Guidance

While this guide provides comprehensive information, it's crucial to work with qualified professionals.

Veterinary ophthalmologist consultation:

  • Provides definitive diagnosis
  • Explains all treatment options
  • Helps assess individual risk factors
  • Monitors for changes over time

Questions to ask your vet:

  • Is treatment medically necessary or cosmetic?
  • What are the specific risks for my cat?
  • How would you monitor if we choose not to treat?
  • What signs should prompt immediate attention?

Looking Forward: Research and Hope

The veterinary field continues to advance in understanding and treating feline eye conditions. Ongoing research may provide a better understanding of genetic factors as well as improved treatment techniques. Other advances will hopefully include less invasive intervention options.


Final Thoughts: You're Not Alone

If you're dealing with a recent diagnosis of feline apocrine hidrocystomas, remember that you're not alone in this journey. The initial shock and concern are completely normal reactions.

Key takeaways:

  • These cysts are benign and often manageable without treatment
  • Your cat's quality of life is the most important factor
  • Treatment decisions should be based on medical necessity, not appearance
  • Many cats live perfectly happy lives with these conditions
  • Connect with other pet parents for support and shared experiences

The goal isn't to make your cat look "normal". It's to ensure they're comfortable, healthy, and happy. Sometimes that means embracing their unique characteristics rather than trying to change them.


Resources and Support

Community support:

  • Breed-specific health groups
  • Online pet parent communities
  • Social media support groups

Educational websites about feline apocrine hydrocystoma:


Remember, every cat's situation is unique. What worked for Bombom might not be the right choice for your feline friend, and that's perfectly okay. The most important thing is making informed decisions based on your individual cat's needs, comfort, and quality of life.


This blog post is based on personal experience and research. Always consult with qualified veterinary professionals for your pet's specific medical needs. While we share our journey openly, individual cases may vary significantly.

©2025