 [ Symptoms ] can bells palsy symtoms mimic a brain tumor [ Disease ] these two medical problems are very very different bell is palsy just follows the nerve pathway on one side of your face often resulting in a droopy eyelid or crooked smile it tends to get better over time it would not be common for a brain tumor to present as bell is palsy although some neurological disorders can cause one side nerve paralysis a brain tumor can present many different ways from a sudden loss of vision or hearing seizures sudden speech problems severe headaches vomiting inability to walk etc