Plural of backache; multiple instances or types of pain in the back, often in the lower back region.
From back (Old English baec) + ache (Old English acan, 'to pain'). Backache is a straightforward compound of two common English words describing back pain.
Back pain is so common that backaches are one of the leading reasons people visit doctors—it affects about 80% of people at some point, making it almost a universal human experience.
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