Cold Urticaria is known to cause anaphylaxis and anaphylactic shock, it is NOT just a nuisance allergy. Most articles that mention anything about anaphylaxis will say it's due to swimming. While part of this is true, swimming can cause anaphylaxis and drowning, it is another irresponsible misconception. ANYTHING that triggers you can cause an anaphylactic reaction leading to anaphylactic shock, and possibly death. For our daughter, anaphylaxis was triggered by walking under an air conditioning vent. For our son, anaphylactic shock has been triggered by numerous things. I have also met a woman who had an anaphylactic reaction from taking a pot roast out of the freezer.
What limited studies there are for Cold Urticaria and anaphylaxis, one study Anaphylaxis Common in Children With Cold Urticaria leads with a very concerning statement, "Cold urticaria—that is, urticaria and angioedema developing after
exposure to the cold—is a rare condition in children. When it does occur, however, it is a harbinger of danger: Children with cold urticaria have an increased risk of anaphylaxis, recent evidence suggests." This study showed that in a group of 30 children, 11 of them had an anaphylactic reaction. In those 11 children, eight of them experienced a decrease in consciousness (eg, dizziness, faintness, or hypotension), and five developed respiratory distress. Another medical article Itchy Hives and Ice Cubes: Cold Urticaria in Children gives another concerning statement "Although rare, cold-induced urticaria is a potentially life-threatening condition that may be under-recognized in the pediatric population." In order to protect yourself or your loved one from an anaphylactic episode or anaphylactic shock you MUST carry TWO Epinephrine pens, commonly called Epi-pens. An Epi-pen is a device that will auto inject a needed dose of epinephrine, or adrenaline into your system during an anaphylactic reaction. Using this pen is not enough, you MUST dial 911 after using it. Ask your Dr. the appropriate amount of time before giving the second pen if help hasn't arrived yet.