Anaphylaxis is a serious allergic reaction that is rapid in onset and may cause death. Signs and symptoms can occur within minutes of exposure to an allergen. In rarer cases, the time frame can vary up to several hours after exposure. The ways that these symptoms occur may vary from person to person and even from episode to episode in the same person. An anaphylactic reaction can involve any of the following symptoms: (skin) hives, swelling, itching, warmth, redness, rash, (respiratory)coughing, wheezing, shortness of breath, chest pain/tightness, throat tightness, hoarse voice, nasal congestion or hay fever-like symptoms (runny, itchy nose and watery eyes, sneezing), trouble swallowing, (gastrointestinal) nausea, pain/cramps, vomiting, diarrhea, (cardiovascular) pale/blue colour, weak pulse, passing out, dizzy/lightheaded, shock, (other) anxiety, feeling of “impending doom”, headache, uterine cramps in females. These symptoms may appear alone or in any combination regardless of the triggering allergen.