{ "@context": "https://schema.org", "@type": "BlogPosting", "headline": "Dog Itching — Allergy or Parasites? Find out the reason for scratching", "description": "Did the dog scratch himself for blood? Itching is not a disease, but a symptom. Read about the most common causes: ulcerative, food allergy or atopy. Sacrum Vantaa helps.", "datePublished": "Jan 27, 2026", }

Dog Itching — Allergy or Parasites? Find out the reason for scratching

📞 Appointment for skin problems in Vantaa: 010 739 9130

Itching is one of the most insidious ailments that deprives both the dog and the owner of the night's sleep. Constant scraping, licking and rubbing break the skin and expose it to inflammation.

But what is the cause of itching? Is it “just” fleas or a lifelong allergy?

Step 1: Ulcological (Easiest to Exclude)

Before talking about allergies, it is always necessary to exclude parasites. Even if the dog is groomed and internally tidy, it can become infected from the outside.

  • Capitis: Severe itching (especially at night), flaking and hair loss. It also infects a person.
  • Lice and midges: Can sometimes be seen with the naked eye on fur.
  • Fleas: Rarer but possible in Finland (e.g. hedgehog flea).

The veterinarian can determine the parasites using a scratch sample or a tape sample.

Step 2: Allergies

If the parasites are evicted and the itching persists, suspicion turns to an allergy.

  1. Atopia (Environmental Allergy): The most common cause. The dog reacts to dust mites, pollen or mold spores. Itching often targets the paws, face, ears and groin.
  2. Food allergy: The dog is allergic to some protein in the food (e.g. beef, chicken). Symptoms are similar to those of atopy, but may be accompanied by abdominal symptoms.

When for examinations?

Do not be left to try shampoos at home if the skin is broken or itching is constant. Come to the reception at the Veterinary Hospital Sacrum if:

  • The dog scratches the skin for blood.
  • The skin reddens, smells bad, or secretes pus (skin infection).
  • The dog licks its paws compulsively.

We will find out the cause of the itching systematically and bring relief to your dog.

📍 Veterinary Hospital Sacrum — Porttisuontie 13, Vantaa

The most common diseases of the senior cat — kidney failure, thyroid gland and pain

Is your old cat losing weight or drinking a lot? Senior cats often suffer from hidden diseases. Read the veterinarian's list of the top 3 most common ailments.

24.01.2026
Blog Category
Canine diabetes (diabetes) — identify symptoms and start treatment

Does your dog drink a huge amount of water? It can be the first symptom of diabetes. Learn how to treat canine diabetes with insulin and diet.

27.01.2026
Blog Category
When is it necessary to remove tartar in a dog? Identify the right moment

When should a dog be taken for tartar removal? Don't wait for teeth to wiggle. Learn why regular cleaning saves money and your dog's health.

27.01.2026
Blog Category
Cat's Tartar and Gingivitis – When to Seek Treatment?

Does your cat have tartar, red gums, or bad breath? Read when dental care is necessary and why a cat's oral pain can go unnoticed.

10.05.2026
Blog Category
Is your cat coughing or wheezing – could it be asthma?

Is your cat coughing, wheezing, or having breathing attacks? Read when it might be asthma and when an examination is necessary.

15.05.2026
Blog Category
Sudden diarrhea in a dog — when to go to the vet?

Dog diarrhea often surprises. When is home care enough and when is a veterinarian needed? Read the instructions for treating bloody diarrhea and diarrhea in puppies.

27.01.2026
Blog Category