Clinical manifestations: unilateral or bilateral onset, but more common unilateral; recurrent swelling of the gland, swelling episodes are mostly related to eating. The gland is mildly swollen, slightly tough, with redness and swelling at the mouth of the ducts. Salivary gland imaging: Salivary gland imaging shows that the dominant duct, interlobular and interlobular ducts are partially narrowed and partially dilated, with salami-like changes. Treatment: 1. Maintain oral hygiene. Avoid retrograde infection of the glandular ducts. Strengthen systemic immunity and avoid colds, which are closely related to acute attacks of salpingitis. 2. Massage the gland after each meal until it becomes soft to promote saliva discharge and avoid saliva storage in the gland. 3.Avoid stimulating food to reduce the secretion of saliva. 4.In the acute stage, systemic antibiotics are given for 3-5 days to control inflammation, while diclofenac sodium suppositories can be applied to relieve pain, gland ice and dexamethasone to reduce swelling. After 3 days of control of the acute phase into the chronic phase, the chronic phase is manifested by the presence of hard lumps in the gland, the long application of antibiotics is ineffective. 5. In the chronic stage, iodized oil infusion in the duct of the gland is a better local treatment method. The iodized oil releases iodine ions which have a strong bactericidal effect and can avoid or reduce systemic medication. However, iodized oil is a highly viscous liquid with poor fluidity and insoluble in water, so it is not absorbed and discharged slowly after injection into the ducts, which makes the gland swollen and intense after perfusion, so it is required to press the gland for 1-2 days immediately after perfusion to promote the elimination of iodized oil. 6. Salivoscopy can expand the narrow and obstructed part of the glandular duct system, and mechanical irrigation removes inflammatory substances such as stones and pus emboli in the duct system, which is an effective method for treating obstructive parotiditis. At the same time, the gland can be preserved to avoid removal of the gland and facial incision. 7. Facial medication is not favored, although facial medication is sometimes effective, but complications are also evident and can easily lead to facial eczema and dermatitis, and even glandular fistula. Complications are too great for the face.