Seek specialist advice.
Mild reactions are treated by avoidance of strong sunlight and the use of a broad spectrum sunscreen. However, this may limit outdoor activities and be socially unacceptable.
Severe cases may be treated with a controlled desensitisation course using phytochemotherapy (a combination of topical or oral psorales followed by UVA cubicle exposure - PUVA) or phototherapy (UVB) before the summer season. This thickens and pigments the skin so enhancing "natural" protection.
In the acute symptomatically debilitating case, a topical steroid is of benefit. If there is substantial disability, a short course of prednisolone (30mg/day for 5-7 days) may be useful (1). If severe pruritus present, anti-histamine should be used. In recalcitrant cases, hydroxychloroquine may be of some benefit (2).
Reference:
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