When a dissociative identity disorder patient switches between identities, the following external physical signs become apparent:

• Headache.
• Confusion.
• Loss of memory.
• Muscle twitching.
• Adjusting clothing.
• Altering posture.
• Throat clearing.
• Avoiding eye contact.
• Blinking slowly.
• Vocabulary alteration.
• Difference in handwriting.
• Altered temperament.
• Seeming "spaced out".
• Shift in voice pitch.
• Diverse functional abilities or skills.