Anaphylaxis: Symptoms, Causes, Treatment and Diagnosis | GetWellGo

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Anaphylaxis: Symptoms, Causes, Treatment and Diagnosis | GetWellGo

  • Category

    General

  • Published By

    GetWellGo Team

  • Updated on

    10-Jun-2025

Anaphylaxis symptoms

Anaphylaxis occurs very quickly as an extremely dangerous allergic reaction after people are exposed to something they are allergic to. Moving to a hospital should be done as soon as symptoms appear. The signs of severe allergic reaction are:

Anaphylactic shock symptoms:

Skin Symptoms (often first to appear):

  • Red bumps called hives or welts can appear on the skin too.
  • Skintone that is either blotchy or very white
  • Face or eye itching
  • Single or multiple areas such as the face, lips, throat, or tongue may show swelling.

Respiratory Symptoms:

  • Difficulty in breathing.
  • Wheezing
  • Chest tightness
  • Coughing
  • Trouble swallowing
  • The feeling of a swollen throat or a throat that is difficulty opening

Cardiovascular Symptoms:

  • Rushing pulse or pulse that is too slow
  • A blood pressure that is lower than normal
  • People may faint and feel dizzy.
  • Shock

Gastrointestinal Symptoms:

  • Feeling sick to the stomach and possibly throwing up
  • Diarrhea
  • Stomach cramps

Neurological Symptoms:

  • Worries or doubt
  • Gloomy foreboding
  • Blacking out

What causes anaphylaxis?

The body’s immune system often causes anaphylaxis when it reacts harshly to a usually safe substance called an allergen. Histamine is suddenly released because of this reaction, which causes inflammation in many parts of the body such as the skin, lungs, heart, and digestive system.

Causes Why Anaphylaxis Develop

Foods

Most of the time, these are the main causes that set off asthma attacks in children.

  • Peanuts
  • Examples of tree nuts are almonds, cashews, and walnuts
  • Shellfish for example shrimp and crab
  • Fish
  • Milk
  • Eggs
  • Wheat
  • Soy

Medications

  • Especially, penicillin was used as the first antibiotic.
  • Types of NSAIDs are ibuprofen or aspirin.
  • Anesthesia drugs
  • Chemotherapy agents

Stings and bites from insects

  • Bees
  • Wasps
  • Hornets
  • Fire ants

Latex

  • It is present in medical equipment, balloons, gloves, and selection of clothing.

Exercise-induced anaphylaxis

  • Sometimes the combination of physical activity and another food or medication causes an upset stomach.

Idiopathic Anaphylaxis

  • In several cases, the reason behind PCP is not discovered.

Anaphylaxis treatment at home

Give Epinephrine immediately to someone experiencing anaphylaxis.

  • If you have an emergency, inject the medicine from EpiPen, Adrenaclick, or Auvi-Q into your outer thigh, even if your clothes are around the spot.
  • Don’t delay. Giving aid promptly makes the outcome much better.
  • In case there are symptoms up to 15 minutes after the first injection, and if you have a second auto-injector, give the second one too.

Use the phone number 112 or 911 to report it.

  • Even if the person gets better after using epinephrine, they still need to visit the hospital.
  • People may suffer a second response from anaphylaxis even hours after the first symptoms.

Ensure the person is in a good position for rehabilitation.

  • Lie on your back and raise your legs to continue your blood’s flow.
  • If vomiting or having breathing problems, turn the pet to its side.

Observe the breathing rate and the heart rate of the victim.

  • If they do not breathe or lose consciousness, you should do CPR.

How to diagnose anaphylaxis?

Any of the following 3 conditions must happen for the diagnosis of anaphylaxis:

The signs of acute onset develop within minutes to hours.

With symptoms on the skin or mucous membranes, together with at least one of the following findings:

  • Any problems with breathing including shortness of breath, wheezing, or a swollen throat
  • Lower than usual blood pressure and signs of problems in organs (for example, fainting or collapsing)

Some of These Signs After Being Exposed to Something Allergic:

  • Skin/mucosal symptoms
  • Respiratory symptoms
  • Lowering blood pressure that can lead to passing out
  • Issues such as vomiting and cramps in the digestive system

After meeting the allergen, there is usually a drop in blood pressure.

  • Adults: Their systolic BP is under 90 mmHg or their reading has lowered by more than 30% since their original one
  • Kids: SBP not reaching the 5th or less percentile for age OR the difference in SBP is more than 30% from baseline

Following the Emergency: Other Tests Can Help Find Out the Cause

These tests are mainly useful for finding out what triggers an attack instead of diagnosing an immediate emergency condition.

Blood Test:

  • Best to do serum tryptase within 1–3 hours of signs and symptoms, because elevated levels are found in most cases of anaphylaxis

Testing done by an allergist can help confirm an allergy:

  • Tests in which a small skin prick is used
  • There are IgE blood tests known as specific tests.
  • Test people by giving them food or medicine when conditions are well controlled

Anaphylaxis emergency treatment

It is necessary to act urgently and use strong measures when treating anaphylaxis because it is a life-threatening condition. The aim is to reduce the allergic response, help a person breathe and circulate blood, and stop any additional problems.

Emergency Medical Treatment:

Injection of Epinephrine 

  • If you are prescribed an EpiPen, or a similar auto-injector, keep it with you at all times.
  • This part of the treatment can be given by injecting into the outer thigh muscle through clothing.
  • It is important to act promptly whenever you see the first symptoms.
  • Take another shot if symptoms have not stopped within 5 – 15 minutes, as long as you have an extra auto-injector.

When an emergency occurs, call the local emergency number (Dial 112 or 911).

  • It is still necessary for the child to be in the hospital if symptoms are better even though they have improved.
  • Sometimes, the condition may follow a biphasic pattern and the person may experience the symptoms again.

Position the Person Properly

  • Sleep with your legs up to encourage circulation in your bloodstream
  • Should someone start vomiting or cannot breathe well, help them lie on their side or sit up.
  • Help them stay in one place and do not allow them to move around

Keep an eye on breathing as well as the heartbeat

  • Ensure there are signs the person is still breathing, pulsing, and conscious
  • Be prepared to give CPR if you notice breathing or pulse has stopped in the person.

Administer Additional Medications (Only After Epinephrine and Under Medical Supervision)

  • You can use antihistamines, such as diphenhydramine or cetirizine, for skin inflammation and itching.
  • Corticosteroids (such as prednisone) – to avoid symptoms that come up later
  • For wheezing or asthma symptoms, you can use drugs like salbutamol given as an inhalation.

Epinephrine for anaphylaxis

Adrenaline (called epinephrine) should always be used first when treating anaphylaxis because there is no alternative.

The role of Epinephrine:

  • It takes little time for epinephrine to start working.
  • Widening the airways (relaxing them)
  • Narrow blood vessels, which increases blood pressure
  • Throat and face inflammation can be halted.
  • Try to calm down the immune system’s reaction to keep allergies in control

How to prevent anaphylaxis?

Preventing anaphylaxis involves avoiding known triggers, being prepared for emergencies, and educating yourself and others. Here's a complete guide:

Identify and Avoid Triggers

Common Triggers:

  • Foods: peanuts, tree nuts, shellfish, fish, eggs, milk, soy, wheat
  • Insect stings: bees, wasps, hornets
  • Medications: antibiotics (e.g., penicillin), NSAIDs, anaesthesia
  • Latex
  • Exercise (exercise-induced anaphylaxis) – sometimes triggered by food or medication combined with activity

It is important to have epinephrine on you at all times.

  • Always have 2 epinephrine auto-injectors (EpiPen, Auvi-Q, and others) with you.
  • Ensure to review the expiration dates often.
  • Let the candies be kept at normal room temperature (not in any very extreme heat or cold).
  • Help your loved ones, associates, or colleagues learn how to use language intervention methods.

Make a plan for emergency situations and explain it to everyone.

  • A document that outlines a detailed strategy for the organization.
  • Your triggers
  • Early symptoms
  • It is important to determine both the timing and the right way to use epinephrine.

It is important to wear Medical Identification.

  • Putting on medical ID jewellery is a good idea.
  • Include the allergies that the child has and the numbers for emergency contacts.

See an allergist from time to time to get checked.

  • To help with a diagnosis, there are tests of the skin or the blood and plans are created for each patient.
  • It may be suggested that patients try allergy immunotherapy for allergies to insect venom in a small number of cases.

Pay Attention to Possible Risks

  • Asthma and allergies sometimes lead to anaphylaxis.
  • Failure to use epinephrine in a timely manner usually leads to worse results.

Anaphylaxis in children symptoms

Skin and Mucous Membranes (Most Common)

  • Hives or red, itchy rashes
  • Swelling of face, lips, eyes, or tongue
  • Flushing or pale skin
  • Itchy or watery eyes

Breathing and Airway Symptoms

  • Shortness of breath
  • Noisy breathing, wheezing, or stridor (high-pitched breathing)
  • Tightness in chest or throat
  • Trouble speaking or hoarseness
  • Coughing or choking
  • Nasal congestion or sneezing

Circulatory Symptoms (Shock)

  • Dizziness or fainting
  • Weak, rapid pulse
  • Pale, cold, or clammy skin
  • Loss of consciousness

Gastrointestinal Symptoms

  • Nausea or vomiting
  • Abdominal cramps
  • Diarrhea

Neurological Symptoms

  • Confusion or irritability
  • Sudden drowsiness or unresponsiveness
  • Sense of fear or “something is wrong”

Why Choose GetWellGo for Anaphylaxis Treatment?

GetWellGo is regarded as a leading supplier of healthcare services. We help our foreign clients choose the best treatment locations that suit their needs both financially and medically.

We offer:

  • Complete transparency
  • Fair costs.
  • 24 hour availability.
  • Medical E-visas
  • Online consultation from recognized Indian experts.
  • Assistance in selecting India's top hospitals for anaphylaxis treatment.
  • Expert doctor with a strong track record of success
  • Assistance during and after the course of treatment.
  • Language Support
  • Travel and Accommodation Services
  • Case manager assigned to every patient to provide seamless support in and out of the hospital like appointment booking
  • Local SIM Cards
  • Currency Exchange
  • Arranging Patient’s local food
     

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