Allergy signs can include sneezing, which is a common symptom of an allergic reaction. Sneezing is the body's way of expelling irritants from the nose and throat, and is often accompanied by other symptoms such as a runny nose, watery eyes, and itching. Allergies can be caused by a variety of things, including pollen, dust, pet dander, and certain foods. If someone is experiencing allergy signs, it is important to seek medical advice to determine the cause and find the best treatment.