Frequent sneezing isn't always a cold as it's often a sign of allergies. Dry winter air, pollution, and irritants can trigger sneezing, nasal irritation, watery eyes, and sinus discomfort. To prevent it, one can cover their nose in cold air, avoid cold drinks, take steam, apply sesame oil at night, consume turmeric milk, soak in sunlight, and eat vitamin C-rich fruits.