Symptoms of 12 herniated thoracic vertebrae are related to whether or not they are compressing the related spinal cord, nerves, or nerve roots, and abdominal discomfort, paraplegia, and other symptoms may occur after compression. 1. Abdominal discomfort: If the herniated lumbar vertebrae compresses the relevant nerves innervating the abdomen, motor and sensory dysfunction of the abdominal skin may occur, followed by abdominal pain and other symptoms of abdominal discomfort. 2. Paraplegia: If the herniated thoracic vertebrae cause spinal cord compression, paraplegia may occur, such as sensory and motor disorders of the lower limbs and urinary and fecal incontinence. Reflexes such as knee tendon reflex and testicular reflex may not be elicited normally. Thoracic herniation of 12 vertebrae may not cause significant clinical symptoms if there is no compression of related tissues. It is recommended that the patient seek medical attention if symptoms occur.