true or false anaphylaxis generally only affects the skin and eyes
Incorrect.
Anaphylaxis
Anaphylaxis ( and φύλαξις "(phylaxis)" 'protection'.) is a serious allergic reaction that is rapid in onset and may cause death. It typically causes more than one of the following: an itchy rash, throat or tongue swelling, shortness of breath, vomiting, lightheadedness, low blood pressure, and temporary blindness. 
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Anaphylaxis [SEP] Introduction
Anaphylaxis ( and φύλαξις "(phylaxis)" 'protection'.) is a serious allergic reaction that is rapid in onset and may cause death. It typically causes more than one of the following: an itchy rash, throat or tongue swelling, shortness of breath, vomiting, lightheadedness, low blood pressure, and temporary blindness. These symptoms typically come on over minutes to hours. Common causes include insect bites and stings, foods, and medications. Other causes include latex exposure and exercise. Additionally, cases may occur without an obvious reason. The mechanism involves the release of mediators from certain types of white blood cells triggered by either immunologic or non-immunologic mechanisms.