Common causes and management of photosensitivity

Abstract

• Photosensitivity is a feature of a wide range of disorders, including the idiopathic photodermatoses, some metabolic disorders and a few rare genetic syndromes. It also occurs after exposure to certain drugs and other exogenous agents. • A photosensitive reaction classically occurs on sun-exposed sites and spares those that are shaded or covered by clothing. • A history of exposure to a photosensitising agent must be explored in all patients with photosensitivity. • Referral to a dermatologist, or a photodermatology centre if available, for light testing and patch testing may be helpful in establishing the diagnosis. • General treatment measures include avoidance of photosensitisers and su..