The common causes of recurrent parotid gland enlargement in children include bacterial infection, viral infection and parotid duct stones. 1. Bacterial infection: Various reasons cause the child’s general immunity or salivary secretion disorder, etc., so that the oral anti-inflammatory effect of sterilization is weakened, leading to bacterial invasion and infection of the parotid gland, which in turn triggers bacterial parotitis, which is mainly manifested in the parotid swelling centered on the earlobe. The main manifestation is the swelling of the parotid gland centered on the earlobe. If the cause of the disease is not eliminated in time, the infection and parotid gland enlargement will occur repeatedly. 2. Viral infections: Repeated swelling of the parotid gland in children can also be due to infection with the mumps virus, which can lead to mumps. Mumps, also known as viral mumps, is a common contagious respiratory disease in children that occurs most often in winter and spring. This disease can also lead to recurrent parotid gland enlargement and pain. 3. Parotid duct stones: Long-term chronic oral inflammation, inorganic salt metabolism disorders and other factors can lead to the formation of stones in the parotid ducts and block the ducts, resulting in parotitis and recurrent parotid gland enlargement. If your child has repeated swelling of the parotid gland, you should go to the hospital in time, and the doctor will make individualized diagnosis and treatment plan, so as not to delay the condition.