Index
What Are Food Allergies?
Food allergies occur when the immune system reacts abnormally to certain foods, causing symptoms that can range from mild to severe. Common allergenic foods include nuts, shellfish, eggs, and dairy.
What Causes Food Allergies?
- Immune system response to specific food proteins
- Genetics may increase risk
- Previous allergic conditions (eczema, asthma, hay fever)
What Are the Common Symptoms?
- Hives, itching, or swelling of lips, tongue, or face
- Abdominal pain, nausea, vomiting, or diarrhea
- Runny nose, sneezing, or itchy eyes
- Shortness of breath, wheezing, or throat tightness
- Severe reactions (anaphylaxis) in rare cases
How Are Food Allergies Diagnosed?
- Symptom history and timing relative to food intake
- Skin prick tests or blood tests for specific allergens
- Online GP consultations can assess symptoms, advise avoidance, and recommend testing
How Long Do Food Allergy Reactions Last?
- Mild reactions usually resolve within hours
- Severe reactions require immediate treatment
Are Food Allergies Contagious?
No. Food allergies are not contagious.
How to Feel Better and Manage Food Allergies
Self-Care at Home:
- Avoid known allergenic foods
- Read food labels carefully
- Keep an emergency plan if at risk of severe reactions
Treatment from a GP:
- Antihistamines for mild reactions
- Epinephrine auto-injectors for those at risk of anaphylaxis
- Referral to allergy specialists for testing and management
When Referral Is Needed:
- Severe or repeated allergic reactions
- Uncertain food triggers
- Management of anaphylaxis risk
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 widespread 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 food allergies
- Guidance on epinephrine use and emergency planning
- Referral to allergy specialists if needed
