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Hello from JustAnswer.
It is unclear what question you are asking.
If you are asking if the bulimia can cause the enlargement of the neck and jaws, the answer is yes. It is common for someone with bulimia to develop swelling of the neck or face, particularly along the jawline. This is due to swelling of lymph nodes or salivary glands from irritation of the throat from the acidic stomach contents.
If you are asking how this would be managed, it would require proper management of the bulimia. As the bulimia gets under control, then the throat, lymph nodes, and salivary glands will heal and return to their normal size.
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