History:

• Symptoms - cough, wheeze, facial swelling
• triggers
• onset, duration
• PMH
• Family Hx of atopy

On examination:

• General exam: rashes, swelling, facial oedema
• respiratory examination: wheeze, stridor

Differential diagnosis:

Allergy:

• anaphylaxis
• allergic rhinitis
• contact dermatitis
• eczema
• drug reactions
• bites/stings
• coeliac
• foods