The cat's whiskers may have fallen off naturally, accidentally broken, malnutrition, endocrine disorders, skin diseases, or chemical drugs. First, check the cat's face for itching, allergies, hair loss, etc. If so, In similar situations, it is best to go to the pet hospital to check whether it is a skin disease or allergy, confirm the cause and treat it in time; if there are no abnormalities on the cat’s face, then there is no need to worry, just add some vitamins and trace elements to the cat.