The person should generally lie flat with their legs raised if this is comfortable and does not worsen breathing. If breathing is difficult, they may need to sit in a position that makes breathing easier. They should not stand or walk around, because sudden changes in position can worsen circulation problems.
If symptoms do not improve or return, a second prescribed dose may be needed according to the emergency plan and local medical guidance. Emergency responders should assess the person even if symptoms appear to improve.
This is very different from managing an ordinary itchy bite. A person with breathing difficulty, throat swelling, faintness, or rapidly developing symptoms needs urgent medical help—not a home remedy.
Chapter 4: What Can Trigger a Severe Allergic Reaction?
Allergic reactions occur when the immune system responds to a substance that it mistakenly identifies as harmful.
For some people, exposure produces mild symptoms such as itching, sneezing, or a small rash. For others, exposure to a particular allergen can cause a severe reaction.
The triggers vary, and not every person reacts to the same substances.
Food allergies
Certain foods are among the best-known triggers of serious allergic reactions.
Common examples include peanuts, tree nuts, shellfish, fish, milk, eggs, wheat, and soy. Other foods can also cause allergies.
A person with a food allergy may develop hives, swelling, itching in the mouth, stomach symptoms, or respiratory problems after eating the triggering food.
Reactions can occur after eating a food directly or, in some circumstances, through cross-contact when a small amount of an allergen enters another food during preparation.
People with diagnosed food allergies should read ingredient labels carefully, communicate their needs when eating outside the home, and follow the medical advice they have been given.
A person who experiences a suspected severe reaction after eating should not wait for symptoms to become more obvious before seeking emergency help.
Medications
Some medications can cause allergic reactions. Antibiotics and certain pain relievers are among the medicines associated with allergic responses, although not every unpleasant reaction to a medication is an allergy.
A side effect, intolerance, and immune-mediated allergy are different things. For example, nausea after taking a medicine does not automatically mean that the person is allergic to it.
A suspected medication allergy should be discussed with a healthcare professional. The person should not deliberately take the medication again to test whether the reaction returns.
If a medication is followed by difficulty breathing, swelling of the tongue or throat, faintness, or other signs of anaphylaxis, emergency care is required.
Insect stings
Bee and wasp stings can cause local pain, redness, and swelling. A larger local reaction may spread around the sting site and remain uncomfortable for some time.
In people with a severe venom allergy, however, a sting can trigger anaphylaxis.
Symptoms may include widespread hives, swelling away from the sting site, breathing difficulty, dizziness, and collapse.
A person who has previously experienced a severe reaction to an insect sting should discuss prevention and emergency treatment with an allergy specialist.
Latex and environmental allergens
Latex is another possible trigger for allergic reactions. It may be present in certain gloves, medical products, and other items.
Environmental allergens such as pollen, dust mites, and animal allergens commonly cause respiratory or skin symptoms, although the type and severity of the reaction vary.
Dust mites are microscopic organisms that live in household dust and can be found in bedding, mattresses, upholstered furniture, and carpets. Their presence does not mean that a bed contains bed bugs. They are different organisms with different effects.
People sensitive to dust mites may experience sneezing, a blocked nose, itchy eyes, coughing, or worsening asthma symptoms. Some may also experience skin irritation.
Can bed bugs cause anaphylaxis?
Bed bug bites can trigger skin reactions, including itching, redness, and swelling. Some individuals develop larger or more widespread reactions than others.
Severe systemic allergic reactions to bed bug bites are considered uncommon. A person who develops breathing difficulty after waking with bumps should not automatically assume that the insects caused the breathing problem.
Other causes may need to be considered, including an unrelated allergy, asthma, medication reaction, infection, or another medical condition.
The correct response is to seek urgent medical assessment when serious symptoms appear, rather than trying to identify the exact trigger at home.
Chapter 5: Why Sleeping in an Old or Unfamiliar Apartment Can Be Risky
An unfamiliar bedroom may expose someone to irritants or pests they would not normally encounter at home.
This does not mean that every old apartment is unsafe. Many older homes are clean, well maintained, and free of infestations. The age of a building alone cannot establish whether insects are present.
However, older furniture, cracks, gaps, and second-hand mattresses can provide hiding places for pests if an infestation has developed.
A guest may not notice anything unusual before going to sleep. Bed bugs are small and often hide during daylight hours, making them difficult to spot without careful inspection.
Check the mattress before unpacking
When staying somewhere unfamiliar, a quick visual inspection can help identify possible signs of bed bugs.
Look at the seams, corners, labels, and folds of the mattress. Check the bed frame and the area around the headboard. Dark spots, shed skins, eggs, or live insects may indicate an infestation.
If you find signs of bed bugs, avoid placing luggage directly on the bed or upholstered furniture. Inform the property owner or accommodation manager and request an appropriate solution.
If the infestation appears significant, changing rooms or choosing another place to stay may be the safest practical option.
Keep luggage away from beds and soft furniture
Bed bugs can travel by hiding in luggage, clothing, and personal belongings.
When possible, keep bags on a hard luggage rack away from walls and beds. Avoid leaving clothes scattered across the floor or storing them in drawers that have not been inspected.
After returning home from a stay where bed bugs may have been present, inspect luggage and clothing before putting everything away.
Clothing that can safely tolerate heat may be placed in a dryer on an appropriate hot setting, following the garment care instructions. Items that cannot be treated safely may require professional advice.
The purpose is to reduce the chance of carrying insects into another room or home.
Do not move potentially infested furniture
If a mattress or piece of furniture appears to contain bed bugs, moving it through the home can spread the insects to other areas.