If sneezing persists and it's due to a cold, it could be a viral infection. It's important to note that sneezing caused by viral colds is usually self-limiting, meaning that the condition of the patient gradually improves on its own, and typically resolves completely within 7 to 10 days even without medication. If sneezing continues for more than a week without improvement, especially if it's long-term and recurrent, then allergic rhinitis should be considered. Allergic rhinitis may manifest as recurrent runny nose and sneezing. In such cases, it often requires appropriate management, including avoiding allergens, avoiding inhaling cold air, and possibly taking leukotriene receptor antagonists or antihistamines for treatment. (Please use medications under the guidance of a physician.)