Frequent sneezing in babies is not necessarily a cold. Some sneezing is normal and is a protective action. Light sneezing and coughing help babies clear secretions from the nose and throat, which is a protective reflex. Frequent sneezing is common in babies up to 1 year old, especially in the first 3-4 months after birth. Small babies have sensitive nasal mucosa and are prone to sneezing when stimulated by things like dust, smoke and cold air. Babies sneeze all the time, it may be a cold or allergic rhinitis. After a baby has a cold, besides sneezing, it is often accompanied by fever, runny nose, cough, crying, nasal congestion, refusal of milk or poor appetite, and even some have digestive symptoms such as diarrhea and vomiting. If you find a red throat when checking your baby, sneezing at this time is definitely a cold. In addition to colds, it is also important to pay attention to any allergy-related problems. If the baby has a history of allergic rhinitis, sneezing, nasal congestion, runny nose, skin symptoms such as eczema or hives, and digestive symptoms such as diarrhea, vomiting, crying, etc., and is fed artificially, i.e., with milk powder or formula, consider whether food allergies are causing respiratory symptoms. If you are over 2 years old, you should consider the diagnosis of allergic rhinitis, you can have blood tests to see if the peripheral blood eosinophils are elevated, and blood allergen testing to determine the cause of allergy, and often anti-allergy treatment will achieve better results.