A member asked:

Most of the time when i eat white or sweet potato i get a lot of mucous and sometimes runny nose. skin test showed neg. what can it be? sensitivity?

A doctor has provided 1 answer
Dr. John Chiu answered

Unknown: Since white and sweet potato bear little in common allergen-wise, it is not surprising that the skin tests were negative. It may also be something you added to the potato causing the problem or just a psychologic issue. A double-blind food challenge may help clarify

Answered 9/12/2017

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