What are the signs of an allergic reaction?

Introduction

Allergic reactions are immune responses to substances that are typically harmless to most people. These reactions can range from mild to severe and can affect various parts of the body. Understanding the signs of an allergic reaction is crucial for timely diagnosis and treatment.

Key Insights

Common Symptoms of Allergic Reactions:
- Swelling of lips and tongue, itching or tingling in the mouth, sensation of warmth, redness to the skin, hives, tightness in the throat, itchy and watery eyes, nausea, vomiting, cramping, and diarrhea.
- Generalized urticaria/angioedema, stridor, wheezing, hypotension, and syncope.
Respiratory Symptoms:
- Asthma and allergic rhinitis are closely related to the severity of skin-test reactions.
- Bronchospasm, edema, inflammation, and mucus secretion in asthma; pruritus, mucosal edema, sneezing, and mucus secretion in allergic rhinitis.
Severe Reactions (Anaphylaxis):
- Anaphylaxis involves multiple systems and can cause cardiovascular collapse and death. Symptoms include generalized urticaria, angioedema, nausea, vomiting, stridor, wheezing, hypotension, and syncope.
- Immediate treatment with epinephrine is essential for anaphylaxis.
Cutaneous Signs:
- Urticaria (hives), vasodilation, vascular permeability, and pruritus are common skin manifestations.
- Hairless, scaly scalp or desquamated dry skin, and retroauricular intertrigo in infants can be early signs of allergy.
Blood and Immune System Indicators:
- Raised blood eosinophil levels are a valid sign of an allergic antibody-type reaction.
- Histamine release from mast cells and basophils plays a primary role in mediating allergic reactions .

Conclusion

Allergic reactions manifest through a variety of symptoms affecting the skin, respiratory system, gastrointestinal tract, and cardiovascular system. Common signs include swelling, itching, hives, respiratory distress, and gastrointestinal issues. Severe reactions like anaphylaxis require immediate medical intervention. Early signs in infants and specific blood markers can also indicate allergic responses. Recognizing these symptoms promptly is essential for effective management and treatment.

What are the signs of an allergic reaction?

Summary

Introduction

Key Insights

Conclusion

Sources and full results

Allergic reactions in man.

Drug allergy can cause various clinical manifestations, including classical allergic reactions like anaphylaxis and contact dermatitis, as well as nonimmunologic effects on immune cells and autoantibodies.

Respiratory disorders and allergy skin-test reactions.

Allergy skin-test reactivity is closely related to respiratory disorders, including asthma and allergic rhinitis, and may be a risk factor for chronic obstructive lung diseases in individuals aged 15 to 54.

The role of histamine in allergic diseases.

Histamine plays a primary role in allergic rhinitis, urticaria, anaphylaxis, and to a lesser degree, asthma, mediating various symptoms through its H1 and H2 receptors.

[Clinical and biological alarm signs of drug allergy (author's transl)].

Drug allergy symptoms are more serious if cutaneous and due to non-specific immuno-allergic mechanisms, requiring detailed observation for potential complications.

ALLERGY | Allergic Reactions

Anaphylaxis is a life-threatening systemic allergic reaction caused by immune-mediated release of mast cell and basophil mediators, often resulting in skin, gastrointestinal, respiratory, and cardiovascular symptoms.

AN EARLY SIGN OF LATENT ALLERGY IN INFANTS

A retroauricular intertrigo is a consistent early sign of latent allergy in infants, but its recognition is often delayed until the child has experienced some form of allergy.

Food allergies.

Food allergies can cause anaphylaxis, a life-threatening allergic reaction in which multiple organs experience allergic reactions at the same time.

The late phase of the immunoglobulin E-mediated reaction: a link between anaphylaxis and common allergic disease?

Late reactions in allergic patients are linked to anaphylaxis, suggesting that the complement system plays a role in both anaphylactic reactions and common allergic diseases.

Classification and Descriptions of Allergic Reactions to Drugs

Type I reactions are immediate, IgE-mediated, and cause immediate symptoms, while type II and III reactions are antibody-dependent cytotoxic and immune complex-mediated, respectively.

Recognizing the allergic person.

Allergies can be identified by recognizing facial expressions and facial lesions, and identifying other symptoms, such as rhinitis, bruxism, and malocclusion.

Try another search