Can my cat's acne spread to other cats?

Feline acne is usually related to blocked hair follicles or skin oils and is not commonly directly contagious. If parasites or bacterial infection are suspected, see your vet and ask whether separation from other cats is needed.

What simple home care can help ease the symptoms?

You can gently clean the affected area and record any changes, but avoid using human medicines on your cat. If signs worsen or pus develops, arrange a vet visit as soon as possible.

How long does it take to get results after a culture or biopsy?

A cytology smear may provide preliminary results on the same day or within a few days. Bacterial culture usually takes 48-72 hours, while biopsy pathology reports may take several days to a week. Exact timing varies by clinic.

How long does acne treatment take before improvement is seen?

Mild cases may improve within a few weeks. Cases with infection or chronic changes may take weeks to months. The treatment course and follow-up schedule depend on your vet's assessment, so follow their instructions.

How much do the tests and treatment usually cost?

Costs vary by clinic and region — ask your vet for an estimate before proceeding.

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Disease Guide

Feline Acne in Cats: Symptoms, Diagnosis & Care [2025]

Feline acne commonly appears on the chin and is often related to abnormal hair follicle keratinisation. Mild cases may improve with cleaning, while more severe cases need medication.

Take 1 minute to check the symptoms first

Last updated: 2026/01/04

Pethealthmap Editorial Team

Sources: ISFM, WSAVA, National Taiwan University Veterinary Hospital

When to See a Vet

Seek immediate veterinary care (emergency)

•Large areas of skin ulceration with persistent heavy pus discharge
•A noticeable lump appears or the lesion expands rapidly
•Persistent loss of appetite with a sharp decline in energy

Schedule a clinic visit as soon as possible (within 24-72 hours)

•Repeated local redness or swelling, or an increase in discharge
•Frequent scratching, biting, or excessive licking of the affected area
•Avoids touch or shows intolerance when the affected area is handled

01What Symptoms Suggest Something Is Wrong?

Cats often develop blackheads or white acne-like spots on the chin or around pores, sometimes with local hair loss, redness, swelling or behaviour changes that suggest discomfort.

Blackheads or white bumps similar to acne are visible around the pores
Patchy or intermittent hair loss, or a noticeable thinning of the coat
Avoids touch or shows discomfort when the affected area is handled
Increased redness, swelling, scabbing or discharge such as pus at the affected site
More frequent scratching, chewing or excessive licking of the area

Seek emergency care immediately if you notice the following symptoms:

⚠️ Large areas of skin ulceration or ongoing pus discharge
⚠️ An obvious lump appears or the lesion spreads quickly
⚠️ Loss of appetite with a sudden marked drop in energy

02How Can You Assess Changes at Home? Key Observations and When It May Be Urgent

Observing and recording key information at home before the appointment can help your vet understand the course of the problem and possible triggers more quickly.

Take close-up photos of the affected area and wider side-view photos, and note the date and time
Record when you first noticed it and the order in which the lesion changed
Observe and record any changes in appetite, water intake and activity level
Note whether bowel movements and urination are normal or abnormal
Weigh your cat weekly and record any weight changes for comparison
Write down any grooming products, washes or medications used recently

03How Will a Vet Diagnose It? Common Tests

Your vet will usually start with a physical examination and may recommend skin tests as needed to clarify whether parasites, infection or other causes are involved.

Physical examination

palpating the affected area and checking the skin and hair follicles

Skin scraping or hair debris examination

looking for signs of parasites or fungi

Cytology smear

checking for inflammatory cells or evidence of infection

Skin biopsy (histopathology)

assessing deeper skin lesions

Bacterial culture and sensitivity testing

confirming whether bacterial infection is present and guiding medication choices

If culture or biopsy is needed, a specialist or teaching hospital with the relevant equipment may be recommended

04How Is It Treated and Managed After Diagnosis? Medication, Diet Changes and Care

Treatment usually focuses on local care and infection control, with medications and follow-up adjusted according to test results and healing progress.

Follow your vet's instructions for local cleaning and topical medication
If bacterial infection is also present, systemic infection control may be needed
If allergies are involved, diet or environmental management may need to be adjusted
Attend follow-up visits to check healing and response to treatment
Adjust medication or the treatment plan based on culture and biopsy results
Recurrent or difficult-to-treat cases should be referred to a veterinary dermatologist for further assessment

05What Should You Prepare Before Seeing the Vet? Key Details That Help Identify the Cause

Bring close-up photos and videos of the affected area, including any licking, chewing or scratching behaviour

Record when the problem started, how it changed and any products used

List all current medications, supplements and food types

Prepare food intake and toileting records for the vet to review

Bring any previous relevant skin test or laboratory reports, if available

Use a secure carrier and call ahead to book the appointment

This content is for reference only and cannot replace a professional veterinary diagnosis. If your pet shows signs of illness, please seek veterinary care promptly.