At TELUS Health MyPet, we're committed to helping you understand all aspects of your dog's health, including less common conditions like contact allergies.
What is a contact allergy?
Contact allergy, or contact hypersensitivity, is a less common form of allergy in dogs. Unlike other allergies, it's not a reaction to foreign proteins, but to inorganic or artificial substances that come into direct contact with your dog's skin.
Common triggers include:
- Plants
- Metals
- Household cleaners
- Waxes
- Concrete
- Plastic
- Rubber
It's important to note that contact allergy differs from contact dermatitis. Contact allergy develops over time with repeated exposure, while contact dermatitis can occur on first contact.
Who's at Risk?
- No specific breed predisposition
- Usually affects dogs 2 years or older
- Equally affects males and females
Recognizing the signs
Initial symptoms:
- Intense itching that worsens over time
As the condition progresses, you may notice:
- Skin redness
- Pimples
- Weepy or crusty areas
- Patches of thinning coat or baldness
- Thickening and darkening of the skin
These symptoms typically appear in areas with less hair:
- Lips and chin
- Armpits
- Lower abdomen and genitals
- Between toes
Hives may also occur in some cases.
When to see your veterinarian
If you suspect your dog has an allergy, we recommend consulting a veterinarian promptly. Allergies don't resolve on their own and can worsen without proper management.
Diagnosis and treatment
Your veterinarian will likely:
- Treat immediate skin symptoms
- Rule out other common allergies (flea, food, atopy)
- Possibly recommend a 10-14 day stay in a hypoallergenic environment
Treatment options may include:
- Anti-itch medications to reduce scratching
- Medicated shampoos
- Antimicrobials if there is a secondary yeast or bacterial infection present
- Anti-inflammatory medications
- Frequent bathing to remove allergens
The most effective treatment is preventing contact with the allergen, though identifying it can be challenging.
How you can help your dog
- Maintain strict parasite control for all household pets
- Bathe your dog regularly with vet-recommended, soothing shampoos
- Dry your dog thoroughly after bathing
- Consider skin-supporting foods and supplements (if appropriate and approved by your vet)
- Be observant of potential allergen sources:
- For muzzle-area symptoms, consider changing food bowls or toys
- For underside symptoms, investigate bedding or floor treatments