The first signs of anaphylaxis are a skin rash, nausea, vomiting, difficulty breathing, and shock.
Usually the first sign of anaphylaxis is a skin rash and then it can be followed by nausea, vomiting, shock and difficulty breathing.
You may also experience shortness of breath, rapid breathing, fainting, lightheadedness, low blood pressure, dizziness, or flushing.
Also other common symptoms of anaphylaxis are a fast heart rate, feeling of impending doom, itching, tongue swelling, difficulty swallowing, facial swelling, mental confusion, nasal congestion, or impaired voice.
The allergic reaction of anaphylaxis is a serious and can be life threatening condition that needs medical attention so you need to call 911 and get medical help right away when you experience anaphylaxis.
The anaphylaxis reaction can occur within seconds or minutes of exposure to an allergen.