There are many different things to look for - rubbing their face in the carpet, biting/chewing at paws, constant scratching, hair loss, dry/flaky skin, etc. My Tatum has allergies but it was my vet who CONFIRMED it. She was scratching non stop around her nose/mouth area and had quite a bit of hair loss there...so I took her in and he did a skin scraping and found out that she actually had an infection due to the constant scratching and he also told me that she had really bad allergies. She is now on an allergy medication and is doing much better
