Medical Definition of grain itch
: an itching rash caused by the bite of a mite of the genus Pyemotes (P. ventricosus) that occurs chiefly on grain, straw, or straw products — compare grocer's itch
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“Grain itch.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/grain%20itch. Accessed 19 Sep. 2021.
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