Parotid swelling without pain or itching may be caused by blocked parotid duct, enlarged lymph nodes, parotid gland swelling and other reasons. 1. Parotid duct blockage: Inflammation of the parotid duct opening or other causes of parotid duct blockage, causing salivary gland drainage obstacles, saliva accumulation, making the parotid gland enlarged. 2. Enlarged lymph nodes: If there is inflammation in other parts such as inflammation of teeth and inflammation in the mouth, it will cause the lymph nodes inside the parotid gland to enlarge, which will lead to parotid gland enlargement, and the original disease should be treated actively. 3. Parotid gland swelling: if there is an unexplained swelling in the parotid gland, such as pleomorphic adenoma, which is benign and common, the early stage will be manifested as parotid gland enlargement which is painless and itchy. Parotid swelling painless and itchy may also exist for other reasons? It is recommended to consult a doctor in time, after a clear diagnosis for treatment.