I have a frequent flyer that I ALWAYS end up with in my ER. I frequently change my hair style/color (only slightly though - never major differences ) and will wear it up, down, ponytail, clip, etc.
This guy never ever remembers me. EVER! He has the same c/o each time, though a different precipitating event.
pt: "I did such and such this morning and hurt my shoulder"
me: No you didn't
pt: what? yes I did
me: No you didn't. Joeshcmoe, this is the 4th time I've seen you for this same complaint.
pt: I ain't never seen you before
me: yes you have
pt: I think you're loosing it lady
me: whatever Joeschmoe - go home
pt: All right. Geez I only wanted some pain pills

(just love the smiley - nothing to do with the post)