Baby sneezing and tearing may be caused by acute upper respiratory tract infection, allergic rhinitis with allergic conjunctivitis and other reasons. 1. Acute upper respiratory tract infection: mainly due to cold, climate change, immunity decline and other reasons leading to external invasion of viruses or bacteria rapidly multiply, showing sneezing, nasal congestion, runny nose, but also may be manifested in cough, sore throat, tears and other symptoms. 2. Allergic rhinitis with allergic conjunctivitis: it refers to the non-infectious inflammatory disease of nasal mucosa after the patient is exposed to allergens. Typical symptoms are paroxysmal sneezing, watery nasal discharge with nasal congestion and nasal itching. Allergic conjunctivitis usually occurs at the same time with allergic rhinitis, and is mainly manifested in the eye symptoms, such as tearing, increased eye secretions, but also eye itching, conjunctival congestion and so on. If your baby has symptoms of sneezing and tearing, do not judge on your own, but go to a regular medical institution for medical treatment immediately.