Sun burn

Key points:

1. Sun is normally caused by UV-B. Severe sunburn may develop on relatively dull days because thin clouds filter UV-B poorly.

2. Burns can be quantified using a burns chart

3. Steroids, both topical and systemic, have proposed for sunburn, but have proved disappointing as they have little or no effect on the injury if used after the burn occurs and a role in exacerbating infection has been suggested.

4. Simple analgesics (ibuprofen and aspirin) are effective.

5. Bear in mind other differentials: drug induced general photosensitivity (e.g. thiazide, tetracyclines, sulphonamides, phenothiazines, griseofulvin, nasals, isotretinoin), acute systemic lupus erythematous and photocontact dermatitis.

6. Prevention:

• avoid direct exposure to summer sunlight during peak UV periods (10 am to 3 pm)
• Use natural shade
• Use sunscreen with a minimum of SPF 30 
• Wear hats and protective clothing

References:

- John Murtagh

- RACGP Check program: May 2016