Itching that won’t quit. Recurrent ear infections. Paw licking that turns into sore, red feet. Dog allergies are a top reason for vet visits—and symptoms often look similar no matter the trigger. The good news: with a clear, step-by-step plan, most dogs get significant relief.

Common dog allergies symptoms

Dogs usually show allergies through skin and ears (not sneezing). Symptoms may be seasonal or year-round, and secondary yeast/bacterial infections are common.

Itching, face rubbing, “air scratching”
Redness, bumps, hives; hot spots
Paw licking/chewing, stained fur between toes
Hair loss, thinning coat
Recurrent skin/ear infections (odour, discharge, greasy or flaky skin)
GI upset (vomiting/diarrhoea) can suggest food issues

Urgent care: facial swelling, widespread hives with lethargy, breathing trouble, repeated vomiting, or collapse.

What causes dog allergies?

Environmental (atopy): pollen, grasses, mould, dust mites; often paws/belly/groin/armpits + ears.
Flea allergy dermatitis: flea saliva; intense itch near tail base/rump/back legs—fleas can be hard to spot.
Food allergy vs intolerance: allergy is immune-driven (often skin/ears, sometimes GI) and can develop after years on the same diet.
Contact allergies: shampoos, cleaners, fabrics, plants; usually where skin touches (paws/belly).

How vets diagnose (why guessing fails)

Itching has many look-alikes. Vets typically: (1) check for parasites and infections (scrapes/cytology, trial treatments), (2) break the itch–infection cycle, (3) run a strict elimination diet trial for suspected food allergies dogs may have (hydrolysed or novel-protein veterinary diets; no extras), and (4) use allergy testing mainly to build immunotherapy for environmental allergy.

Allergy treatment options that really help

Consistent flea prevention (foundational—even if you don’t see fleas).
Topicals: antimicrobial or barrier/anti-itch shampoos, wipes/mousse for paws/folds; rinse/wipe after walks to reduce surface allergens.
Prescription itch control: targeted therapies; corticosteroids can work but require careful vet monitoring.
Immunotherapy (shots/drops): best “treat-the-cause” option for environmental allergies; can reduce meds over time.
Treat infections fully (skin/ears) and recheck—stopping early invites relapse.
Confirmed food allergy: stick to a complete commercial diet that avoids triggers; keep an approved treat/chew list.

Home care to reduce flare-ups

Wipe/rinse paws and belly after outdoor time; wash bedding fragrance-free; vacuum (HEPA if needed); avoid scented sprays/cleaners.
Support skin barrier: vet-guided bathing, consider omega-3s, keep nails trimmed.
Track patterns (season, body areas, diet/treat changes, products, baths) to pinpoint triggers.

If flare-ups are frequent or meds keep repeating, ask your vet about a veterinary dermatologist. With the right layered plan, most dogs become comfortable, playful, and far less itchy.