The occurrence of allergies and the risk of anaphylaxis is increasingly becoming a problem worldwide, and Australia is not an exception. Millions of children and adults in Australia suffer from these conditions, affecting quality of life. As per the Australasian Society of Clinical Immunology and Allergy (ASCIA), it is approximated that one in five Australians has allergies and anaphylaxis. With the rising prevalence of allergic reactions and the life-altering aspect of anaphylaxis, recognizing the symptoms, first aid measures, and prevention factors is imperative in ensuring safety.
The purpose of this article is to give a complete overview of allergies and anaphylaxis, including the symptoms, usual causes, first aid measures, and precautions to avoid these conditions.
What is an Allergy?
An allergy is an excessive response of the immune system to substances that are generally harmless in the majority of individuals. The substances, referred to as allergens, induce a reaction in which the immune system creates immunoglobulin E (IgE) antibodies. The IgE antibodies attach to mast cells found in tissues around the body, and these cells release histamine and other chemicals. These chemicals are responsible for the symptoms of an allergic reaction.
How Allergic Reactions Happen
Allergic reactions can happen in a number of ways:
- Contact Reactions: Happen when an allergen touches the skin or mucous membranes.
- Ingested Reactions: Occur when someone eats an allergen.
- Respiratory Reactions: Result from breathing in allergens, like pollen or animal dander.
- Anaphylactic Reactions: The most severe type of allergic reaction, a sudden release of chemicals that cause swelling in airways and a lowering of blood pressure, with symptoms of breathing difficulty and possible shock.
Principal Symptoms of Allergy
Allergic reactions range from mild to fatal. Typical symptoms of allergic reaction are:
- Hives: Itchy, raised red rashes on the skin.
- Swelling: Swelling of lips, face, tongue, or eyes.
- Conjunctivitis: Red, itchy, watery eyes.
- Allergic Rhinitis: Blocked, runny, or itchy nose, sneezing.
- Breathing Difficulty: Wheezing, coughing, shortness of breath, or chest tightness.
- Gastrointestinal Symptoms: Vomiting, diarrhoea, or pain in the stomach.
- Skin Symptoms: Dry, red, and cracked patches on the skin.
Common Allergy Types
Allergic reactions can happen due to a variety of allergens. They may be environmental, food, or other substances. Some of the most common types are:
Food Allergies
Food allergy results when the immune system inappropriately responds to a food protein as if it were harmful. Common food allergens are:
- Cow’s milk
- Eggs
- Peanut
- Tree nuts
- Fish
- Shellfish
- Soy
- Wheat
Symptoms can involve hives, swelling, gastrointestinal upset, and, in the most serious form, trouble breathing or anaphylaxis.
Drug Allergies
Drug allergies result when the immune system has an unfavorable response to a medication. Medications that most often cause allergic reactions are:
- Penicillin and other antibiotics
- Sulfa drugs
- Insulin
- Local anaesthetics
Symptoms can include rash on the skin, itching, swelling, fever, and shortness of breath.
Inhalant Allergies
Inhalant allergies, also referred to as allergic rhinitis or hay fever, are triggered by airborne allergens such as pollen, dust mites, or animal dander. The symptoms include sneezing, runny nose, watery eyes, and stuffy nose.
Contact Allergies
Contact dermatitis is the result of the skin coming into direct contact with an irritant or allergen. Frequent causes include:
- Nickel
- Latex
- Specific fragrances found in cosmetics and cleaning agents
Symptoms are redness, swelling, itching, and blistering of the skin.
What is Anaphylaxis?
Anaphylaxis is a severe, potentially life-threatening allergic reaction that can develop within minutes of exposure to an allergen. It is a systemic response in which the immune system releases a large surge of chemicals that lower blood pressure and cause the airways to become swollen, making it hard to breathe. Anaphylaxis needs immediate medical care because it can lead to shock or even death without proper treatment.
Symptoms of Anaphylaxis
Anaphylaxis symptoms may be variable but usually involve:
- Severe swelling of the lips, tongue, or throat
- Shortness of breath
- Wheezing and coughing
- Chest pain and abnormal heartbeat
- Nausea and vomiting, diarrhoea
- Dizziness or fainting
- Loss of consciousness
Untreated anaphylaxis may result in respiratory failure, cardiac arrest, or death.
Anaphylactic Shock
Anaphylactic shock is the most severe type of anaphylaxis, with the body’s reaction to the allergen leading to a sudden fall in blood pressure. This leads to a lack of blood flow to the organs and can result in organ failure. Adrenaline (epinephrine) needs to be administered immediately in order to reverse this life-threatening reaction.
Emergency First Aid for Severe Allergic Reactions
Time is of the essence in the event of anaphylaxis. The following must be done immediately:
- Administer Adrenaline: If the individual has an epinephrine auto-injector (e.g., EpiPen® or Anapen®), inject it into the outer mid-thigh. This is the most effective method to reverse the effects of anaphylaxis.
- Position the Person: Have the person lie flat with legs raised. If the person is struggling to breathe, they might need to sit up a little. Never let them stand or walk.
- Call for Help: Call triple zero (000) to ask for an ambulance. Let the operator know what is happening, and be prepared to tell them symptoms and when the reaction occurred.
- Stay Calm: Keep the person calm while waiting for medical help to arrive. If they become unconscious, place them on their side and lift their chin to open the airway.
- Repeat Adrenaline: If there is no improvement after five minutes, another dose of epinephrine may be necessary.
Medication-Induced Anaphylaxis
Drugs are a major trigger for anaphylaxis, particularly in the elderly. Certain antibiotics and analgesics can cause life-threatening allergic reactions. Ensuring that healthcare professionals are alerted to any known drug allergies when prescribing drugs is vital.
How to Prepare for Allergies and Anaphylaxis
Preparation can reduce allergies and prevent serious reactions. Some key tips include:
- Know Your Allergies: Find out your allergens by being tested by a physician or allergist.
- Carry an Epinephrine Injector: In case you are prone to anaphylaxis, always keep an epinephrine auto-injector with you.
- Wear an Identification Bracelet: Wearing a necklace or bracelet that tags you as having severe allergies can assist others in acting swiftly during an emergency.
- Know When to Get Assistance: If you have an allergic reaction, do not delay in seeking medical care. Life-threatening symptoms like having trouble breathing or swelling of the face and throat necessitate immediate action.
Preventing Allergies
Although it is not always possible to avoid allergic reactions, there are measures that can be taken to manage and minimize symptoms:
- Steer Clear of Known Triggers: Avoid allergens, including specific foods, medications, or environmental allergens like pollen.
- Use Medications: Antihistamines and nasal sprays can be utilized to control allergy symptoms, particularly in hay fever.
- Use Air Purifiers: An air cleaner will eliminate allergens from the house, particularly for respiratory allergy sufferers.
- Keep the Environment Clean: Regularly wash your house to minimize dust mites and other allergens. Change bed linens and pillows often.
First Aid Training for Anaphylaxis
Anaphylaxis is potentially life-threatening, and being able to react properly is critical. CPR First Aid provides extensive first aid training, including advanced asthma and anaphylaxis training. The classes instruct students on what to look for and how to handle life-threatening allergic reactions, including the correct use of an epinephrine injector. CPR First Aid’s courses are intended to teach participants what they need to know to react with confidence in a medical emergency.
Conclusion
Allergies are a widespread and growing concern, with the potential to cause severe reactions such as anaphylaxis. Understanding the symptoms, triggers, and appropriate first aid procedures is vital in managing these conditions safely. Whether for food allergies, insect stings, or medication-induced reactions, timely intervention can save lives.
CPR First Aid strives to deliver critical training to individuals and businesses throughout Australia, enabling individuals to respond properly to allergic reactions and anaphylaxis. Educated with the proper knowledge and preparation, other allergic reactions can be handled confidently, reducing the chances of serious consequences.