Phytophotodermatitis due to chinese herbal medicine decoction

Area of Science:

• Dermatology
• Toxicology

Background:

• Phytophotodermatitis is an inflammatory skin reaction caused by contact with certain plants followed by exposure to ultraviolet radiation.
• It commonly presents as erythema, edema, and hyperpigmentation in a linear or bizarre pattern.

Purpose of the Study:

• To report a case of phytophotodermatitis in a child resulting from exposure to a Chinese herbal medicine decoction.
• To highlight the importance of considering phytophotodermatitis in the differential diagnosis of unusual skin lesions after herbal exposure.

Main Methods:

• Clinical presentation of a 24-year-old female's son with a 7-day history of skin lesions.
• Physical examination of the child's legs, neck, and upper chest revealing characteristic hyperpigmented streaks and maculae.
• Detailed patient history including the application of a Chinese herbal medicine decoction to the affected areas.

Main Results:

• The child presented with sharply demarcated, bizarre patterns and linear streaks of hyperpigmentation on his legs.
• Bizarre, alutaceous (powdery or flaky) brown maculae and patches were observed on the neck and upper breast.
• The clinical findings, combined with the history of herbal medicine exposure, led to a definitive diagnosis of phytophotodermatitis.

Conclusions:

• Phytophotodermatitis can occur following topical application of Chinese herbal medicine decoctions containing photosensitizing agents.
• Prompt diagnosis and identification of the causative agent are crucial for effective management and prevention of recurrence.
• This case underscores the need for awareness among healthcare providers regarding phytophotodermatitis from traditional herbal remedies.