Quoting Dallas ♥ Isla:" my daughter who is 5.5 months old has been rubbing/grabbing./tugging at her left ear for the past several ... [snip!] ... right now if that matters is the ear rubbing cause for concern? should I be taking her to the pedi? thanks in advance!"
my son was doing that and at his check up the doc check them and they were fine. He'd do it every time he was having a fit which would lead someone to assume ear infection. If she isn't showing any other signs but pulling on it I wouldn't worry about it.