Enlarged pineal gland is abnormal, including congenital factors, tumors and so on. 1. Congenital factors: There are no obvious symptoms caused by congenital factors. Most of the congenital enlargement is benign, and the main focus is to observe the condition, which has no clinical significance and does not need treatment. 2. Tumor: If the enlargement of pineal gland is caused by tumor, the condition may be aggravated, which may eventually lead to obstructive hydrocephalus; the patient may have increased internal pressure, cerebral edema, etc., which is manifested as headache, nausea, and vomiting, etc. Surgery is usually chosen at an early stage. Surgery is usually chosen at an early stage, which is more difficult, and gamma knife treatment is available. Those who find enlarged pineal gland are recommended to consult a specialized physician.