Patients typically present with ptosis (drooping eyelids). An observed side effect in a minority of patients is "ptosis" or eyelid droop. Congenital neurogenic ptosis is believed to be caused by Horner's syndrome. Involvement of T1 may result in Horner's syndrome, with ptosis, and miosis. Neurotoxic symptoms (ptosis, ophthalmoplegia, bulbar paralysis, and peripheral muscular weakness) developed in 85%. Surgical intervention can also help temporarily manage symptoms related to the ptosis and dysphagia. Congenital ptosis is hereditary in three main forms. Massive weight loss can result in sagging chest tissue known as chest ptosis. Gravity is the most common cause of breast ptosis, or sagging. It inactivates the superior tarsal muscle which produces ptosis. The ptosis of Horner syndrome can be quite mild or barely noticeable (partial ptosis). Mild ptosis may occur with aging. Pregabalin, an anticonvulsant drug, has also been known to cause mild ptosis. Acquired ptosis is most commonly caused by aponeurotic ptosis. According to ophthalmology studies done on ptosis patients, occurrence rates are as follows.