Itchy skin, especially paws, ears, belly, face, or armpits
Excessive licking, chewing, or scratching
Red, inflamed, or irritated skin
Recurrent ear infections
Head shaking or ear odor
Hair loss or thinning coat
Hot spots or skin sores
Watery eyes or eye discharge
Sneezing or coughing
Runny nose
Vomiting
Diarrhea
Gas or stomach upset
Chronic paw licking
Rubbing face on furniture or carpet
Hives or raised bumps
Swelling of the face, lips, or eyelids
Symptoms that worsen seasonally
Symptoms that improve and return after certain foods, treats, or environments
Signs that started after a diet change, new shampoo, or new household product
Persistent symptoms despite flea prevention
Flea dirt, fleas, or flea bite irritation
Symptoms that appear after walks, grooming, or outdoor exposure
Lethargy or discomfort from constant itching
Skin infections from repeated scratching or licking