One of my twin babies has started biting herself when I try to soothe her (when she starts crying). She will try to bite her lower arms or wrist and leave bite marks. After that she will start shrieking and crying because of the pain.
I have checked her mouth to see if she is teething, but she is NOT. Her gums are not hard and she has got 3 teeth which she had by 10 months. She also doesn't bite me or anyone else.
She just loves biting herself and then shrieks. Everytime, she tries to bite, I firmly hold her hand and say NO, then she starts crying. If she sees I am not watching her, she quickly tries to go for a bite (sadly it's her wrist she bites).
This has started from last three days only and I am worried that my other twin will also start copying and will bite herself.