L.L.
I have a 14 month old daughter that has just begun doing the same thing. She will cry and scream and bite her wrist. I've seen her also bang her head on the wall/floor and look right at me. It appears to be when she doesn't get her way or when I leave her with someone else. Though she walked very early, she really has just started talking. Some I do think is frustration, as well as her personality. I'm hoping it will get better as she learns to talk more. When she does this I try not to react or redirect her. sometimes it works...sometimes it doesn't.
A little about me:
We just moved here from Saranac Lake, NY. We have 6 year old and 14 month old daughters. My hubby and I have been married for 5 years.