Challenge to diagnose unusual allergies

Some could have reactions to sunlight or when exercise is combined with certain food

When Melissa (not her real name) excused herself from a university orientation game by saying she was allergic to sunlight, she did not receive much sympathy from her peers.

"Some joked that I was a vampire, but I wasn't amused," said the entrepreneur, now in her late 20s. "I would develop an uncomfortable rash on my neck and back if I am out in the sun for too long."

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A version of this article appeared in the print edition of The Straits Times on November 27, 2018, with the headline 'Challenge to diagnose unusual allergies'. Print Edition | Subscribe