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- Angio-oedema develops within minutes or hours and affects the lips, eyelids, cheeks, tongue and larynx.
- A dangerous sign is laryngeal oedema: the voice becomes hoarse, and there is a feeling of pressure and shortness of breath.
- With swelling of the face, tongue or throat and difficulty breathing, an ambulance must be called immediately.
- The causes include foods, medicines, insect bites, heredity, thyroid or blood disorders.
- The condition is managed by an allergist-immunologist, and if it is impossible to see one — by a physician; the examination begins with a physical examination and history taking.
What is angio-oedema
Angio-oedema is a rapidly developing deep swelling of the skin, subcutaneous tissue and mucous membranes. Most often it is associated with an allergic reaction, but it can also have other causes.
What happens in the body
Angio-oedema develops when the walls of small blood vessels become permeable and the liquid part of the blood leaks into the surrounding tissues. Because of this, the skin and subcutaneous tissue become saturated with fluid and visibly swell in a limited area. Most often this process is triggered by an allergic reaction, in which the body responds to a foreign substance by releasing active compounds. These compounds dilate the vessels and increase their permeability, so the swelling grows rapidly, within minutes or hours. It is noticeable primarily on the lips, eyelids, cheeks, as well as in the area of the mucous membranes of the mouth and throat. When the larynx swells, the voice becomes hoarse, and a feeling of pressure and shortness of air appears. Therefore, with rapid swelling in the area of the face or neck, it is important not to wait for it to pass on its own, but to seek medical help immediately.
What causes it
- Food products: nuts, seafood and eggs often become the cause of a reaction, because the body perceives the proteins of these products as foreign.
- Medicinal preparations: some remedies are capable of triggering an allergic response, and then the swelling occurs soon after taking or administering them.
- Insect bites: when bitten, substances enter the blood to which a sensitive person reacts with rapid swelling of the tissues.
- Hereditary predisposition: in some people the tendency to such a condition is passed down in the family, and then the triggers for it may be non-obvious.
- Diseases of the thyroid gland or blood: against the background of these conditions, the body may react with swelling even without direct contact with an allergen.
- Unknown cause: sometimes it is not possible to establish what exactly provoked angio-oedema, and then it is called idiopathic.
Who encounters this more often
Angio-oedema occurs in people of different ages, but it is more often noticed in those who are already prone to allergic reactions. In such people the body responds acutely to foods, medicines or insect bites, and the swelling develops faster and more noticeably. The hereditary form is passed down in the family, so if close relatives have had similar episodes, the risk is higher for the other family members as well. A separate group consists of people with diseases of the thyroid gland or blood: against their background, swelling may occur without obvious contact with an allergen. In some patients the cause is not found at all, and then the condition is called idiopathic, which does not make it any less serious. What also matters is how often a person encounters their allergens: constant contact increases the likelihood of repeated episodes. Therefore, with a tendency to such reactions, it is important to know one's triggers and discuss them with a doctor in advance.
What symptoms can occur?
Angio-oedema is noticed by the sudden swelling of the lips, eyelids, cheeks or tongue, which appears within minutes. It is important to immediately assess whether breathing is difficult, and if there are alarming signs, to act without delay.
How it is noticed at the very beginning
Angio-oedema begins with a feeling of fullness or burning in the place where swelling soon appears. A person notices that a lip, eyelid or cheek has become firm and enlarged, and the skin in that place is stretched. When pressing on the swollen area, no pit remains, because fluid accumulates in the deep layers. This is often put down to fatigue, lack of sleep or an accidental insect bite, since at first there may be no pain. If the tongue swells, speech becomes unclear, and the swelling interferes with normal chewing of food. Swelling of the hands or feet is noticeable because usual shoes and rings suddenly become tight. When such swelling appears, one should not wait for it to go away on its own — see a doctor to rule out dangerous forms.
Signs that occur most often
- Swelling of the lips, eyelids, cheeks or tongue: firm swelling without a pit when pressed, which quickly increases and changes the usual features of the face.
- Difficulty breathing, hoarseness of voice: an alarming signal that the swelling involves the larynx and narrows the passage for air.
- A feeling of fullness or burning at the site of the swelling: an unpleasant sensation appears before the swelling itself and helps to notice the onset in time.
- Swelling of the hands, feet or genital organs: the limbs and external organs swell firmly, making rings, shoes and clothing tight.
- Abdominal pain with swelling of the intestine: cramps and bloating indicate that the swelling has spread to the walls of internal organs.
When to seek help urgently
Examinations and tests
Examination for angio-oedema begins with a conversation with the doctor and a physical examination, not with tests. The specialist clarifies what preceded the swelling and, based on the findings, decides which investigations are needed.
How the examination begins
The examination and history-taking are the first step, because it is the conversation with the doctor that sets the direction for further investigation. The specialist asks in detail about what preceded the swelling: food, contact with an animal, a new household chemical, an insect bite. Separately, they clarify whether similar episodes have occurred before in the person themselves or in their relatives. The doctor examines the skin, lips, eyelids and tongue, assessing the density and extent of the swelling. If the swelling recurs without an obvious cause, this changes the course of the examination and requires closer attention. If hereditary angio-oedema is suspected, the doctor refers the patient for special blood tests. Therefore, it is worth coming to the appointment with a recollection of what happened before the swelling: these details noticeably help the doctor.
What is prescribed and what it shows
What is worth preparing for the appointment
- Discharge summaries: take medical documents from other institutions so that the doctor can see the full picture of your health and past visits.
- Previous tests: bring the results of earlier blood tests, if you have them, as comparison helps to notice changes.
- Observations: write down what preceded the swelling, how long it lasted and how it changed, because these details are difficult to recall at the appointment.
- Family history: check with your relatives whether they have had similar episodes of swelling, as this influences the choice of examination.
- List of questions: formulate in advance what you want to find out from the doctor so that you do not forget anything during the conversation.
Which doctor should I see?
The choice of doctor for angio-oedema depends on whether the cause of the reaction is known and how pronounced the manifestations are. Below — who to consult, what happens at the first appointment and what areas the care consists of.
Which specialist manages this condition
Angio-oedema is managed by an allergist-immunologist, and if it is not possible to see one — by a physician. The allergist-immunologist understands the mechanisms of the reaction and distinguishes the allergic nature from hereditary angio-oedema. The physician sees the patient initially, assesses the general condition and, if necessary, refers to a specialist. If there is no specialist nearby, start with the physician: they will take a history and decide where to refer next. At the appointment the doctor clarifies when and after what the oedema appeared, how quickly it developed and what has already been done. Separately, it is established whether relatives have had similar episodes, since this changes the approach to care. The doctor examines the skin, lips, eyelids, assesses breathing and voice in order to rule out a threat to the larynx. Based on the examination, they determine whether hospitalisation is needed or whether the patient can be monitored on an outpatient basis.
What the treatment consists of
- Selection of therapy by the doctor: the specialist chooses the direction of care taking into account the cause of the oedema, therefore taking remedies on one's own is unacceptable.
- Observation in hospital in severe cases: if the oedema affects the airways, the condition is monitored in conditions where help is available around the clock.
- Teaching the patient what to do during an attack: the person learns in advance what to do in case of a repeated episode and when to call emergency help.
- Consultation with an allergist-immunologist: the specialist clarifies the nature of the condition and, in hereditary angio-oedema, suggests a different approach than in the allergic form.
What depends on the patient themselves
The regularity of follow-up with the doctor determines how predictable the condition will be in the future. If episodes recur and visits are postponed, the cause remains unclear and care is selected blindly. The patient helps the doctor when they describe in detail what preceded the oedema: food, contact with animals, taking remedies, insect bites. Records of the time and circumstances of attacks give more than general recollections at the appointment. It is important to report hereditary cases in the family, because in hereditary angio-oedema care is structured differently. On discharge from hospital, it is worth clarifying which doctor to see next and how often. Missing a scheduled visit often leads to the next attack catching the person without a ready plan of action. Keep information about your condition at hand so that in a sudden episode those around you understand what is happening.
What helps prevent an exacerbation?
Preventing exacerbations of angio-oedema largely depends on the person's own everyday decisions. Regular monitoring and attention to one's own condition help reduce the risk of repeated episodes.
What is changed in habits
Avoiding known allergens becomes the main daily habit in confirmed allergic nature of angio-oedema. If a person knows what their body reacts to, they can remove this factor from their daily life and diet in advance. In the hereditary form, it is important to know one's own triggers and to have a pre-thought-out action plan in case of exacerbation. Such a plan helps one not to get confused and to act consistently when the first signs appear. Wearing a medical identifier gives others information about the person's condition in a situation when they themselves cannot explain anything. Timely consultation with a doctor at the first signs allows the situation not to be brought to a severe course. Following the treating doctor's recommendations maintains a stable condition and reduces the frequency of repeated episodes. It is useful to discuss with close ones in advance what to do in case of sudden deterioration, so that help comes without delay.
What should be kept under control
- Avoiding known allergens: this is the basis of everyday prevention, since contact with the causative factor directly triggers an exacerbation.
- Knowing one's own triggers: in the hereditary form, it is important to understand which circumstances provoke the oedema in order to take them into account in advance.
- Action plan for exacerbation: a pre-thought-out sequence of steps helps one not to get confused and to act quickly when signs appear.
- Medical identifier: it informs others about the person's condition in a situation when they cannot explain what is happening themselves.
- Following the doctor's recommendations: adherence to the prescribed monitoring maintains a stable condition and reduces the frequency of repeated episodes.
How often to see a doctor
Regular follow-up with a doctor helps control the condition even when one's well-being remains good. Between exacerbations it may seem that there is no reason for a visit, however it is precisely during calm periods that the specialist assesses the overall picture and adjusts the monitoring. The doctor clarifies which factors provoke exacerbations in a particular person and helps build an action plan in case they appear. If the allergen is known, the specialist will advise how to consistently avoid contact with it in everyday life. In the hereditary form of angio-oedema, such monitoring is especially important, since the course of the condition may change over time. Timely consultation with a doctor at the first signs of exacerbation allows one to understand the situation more quickly and not to miss the moment. It is reasonable not to postpone a routine visit until the next episode, but to adhere to the regularity of examinations agreed with the doctor.
What is worth remembering
Angio-oedema develops rapidly, and sometimes only a few minutes pass from the first sensations to a dangerous state. Therefore, it is important to understand in advance what to do during a repeat episode and whom to turn to for help.
Key takeaways
Angio-oedema requires vigilance, because outwardly it may look like ordinary swelling, but in fact it affects the deep layers of the skin and mucous membranes. The danger is related to its location: when angio-oedema affects the tongue, larynx or neck area, breathing can be impaired suddenly. A person who has already experienced an episode should discuss a plan of action with a doctor in advance in case it recurs. One must not delay seeking help if the swelling is accompanied by difficulty breathing, hoarseness or a feeling of tightness in the chest. Self-treatment of angio-oedema is unacceptable: attempts to wait it out or relieve the condition with makeshift remedies waste time. It is important to remember that angio-oedema can recur, so follow-up with a specialist and review of possible triggering factors remain significant. Only a doctor is able to distinguish angio-oedema from other conditions and determine further management.
