Index
- What Are Allergic Reactions?
- What Causes Allergic Reactions?
- What Are the Common Symptoms?
- How Are Allergic Reactions Diagnosed?
- How Long Do Allergic Reactions Last?
- Are Allergic Reactions Contagious?
- How to Feel Better and Manage Allergic Reactions
- When to Seek Urgent Medical Help
- How Dr.Online UK Can Help
What Are Allergic Reactions?
Allergic reactions occur when the immune system overreacts to a substance (allergen) that is usually harmless. Reactions can range from mild skin irritation to severe, life-threatening anaphylaxis.
What Causes Allergic Reactions?
- Foods (nuts, shellfish, eggs, dairy)
- Medications (antibiotics, NSAIDs)
- Insect stings or bites
- Latex or other chemicals
- Environmental allergens (dust, pollen, pet dander)
What Are the Common Symptoms?
- Skin reactions: hives, redness, itching, or swelling
- Swelling of lips, tongue, or throat
- Sneezing, runny nose, or watery eyes
- Nausea, vomiting, or abdominal pain
- Difficulty breathing, wheezing, or chest tightness
- Severe reactions (anaphylaxis) in rare cases
How Are Allergic Reactions Diagnosed?
- Symptom history and timing of exposure
- Physical examination
- Allergy testing (skin prick or blood tests) if needed
- Online GP consultations can assess symptoms, advise avoidance, and recommend testing or treatment
How Long Do Allergic Reactions Last?
- Mild reactions usually resolve within hours to a day
- Severe reactions require immediate treatment
Are Allergic Reactions Contagious?
No. Allergic reactions are not contagious.
How to Feel Better and Manage Allergic Reactions
Self-Care at Home:
- Avoid known allergens
- Use antihistamines for mild symptoms
- Monitor for worsening signs
Treatment from a GP:
- Prescriptions for antihistamines or corticosteroids
- Epinephrine auto-injectors for those at risk of anaphylaxis
- Referral to allergy specialists if needed
When Referral Is Needed:
- Recurrent or severe allergic reactions
- Unclear triggers
- Risk of anaphylaxis
When to Seek Urgent Medical Help
Seek urgent care if:
- Difficulty breathing, swallowing, or speaking
- Swelling of the face, lips, or throat
- Rapid onset of hives, dizziness, or collapse
Call emergency services immediately in suspected anaphylaxis.
How Dr.Online UK Can Help
We offer:
- Same-day online GP appointments
- Assessment, advice, and prescriptions for allergic reactions
- Guidance on epinephrine use and emergency planning
- Referral to allergy specialists if needed
