However , it is also self - limiting and will often disappear in the toddler years .
The precise mechanism is unclear and it could be immunologic , although not through the IgE - type antibodies that have the leading role in urticaria and anaphylaxis .
It is also self - limiting and will often disappear in the toddler years .
The precise mechanism is unclear and it could be immunologic , although not through the IgE - type antibodies that have the leading role in urticaria and anaphylaxis .