There are several common causes of ptosis in adults: congenital: detected after birth but not treated in time. Traumatic: Various traumatic injuries to the upper eyelid such as blunt contusion or eyelid laceration can damage the levator muscle and cause ptosis. Burns to the eyeball can cause lid adhesions and, in severe cases, make it difficult to open the eyelids, and sometimes ptosis can result from orbital or eyelid surgery. 3. Neurological diseases: such as myasthenia gravis, which is characterized by difficulty in opening the eyelids, limited eye rotation in severe cases, and generalized weakness, with the typical symptoms of morning lightness and evening heaviness, that is, getting up in the morning in a fashionable manner, and aggravating eye muscle weakness and generalized symptoms in the afternoon. Intracranial occupational or inflammatory lesions can also sometimes compress and damage the nerve, causing ptosis. Patients with oculogyric nerve palsy also have ptosis, external strabismus, and limited eye rotation. Patients with facial palsy can also have drooping eyelids and drooping eyebrows. 4. Orbital lesions: If the orbital wall is fractured, an intraorbital mass can compress and damage the neuromuscles, causing ptosis. 5. Eyelid masses: Larger masses on the eyelid, such as neurofibroma and hemangioma. 6. Hyperthyroidism: Patients with hyperthyroidism can sometimes exhibit receding or drooping eyelids. 7. Aging: The upper eyelid becomes difficult to open and progressively worse as we age, even affecting vision and life. For patients with ptosis, it is important to first identify the cause before treatment can be given. If necessary, the doctor will recommend that the patient be examined by a neurologist or endocrinologist, etc., to exclude systemic diseases, as some cases can be treated with medication. Only when the cause is clearly identified can treatment be targeted, although in most cases surgery is required.