I put a pillow between my knees since they touch together and it hurts. It's the same as preventing bedsores.
「膝の骨があたって痛いので枕を間に入れる。褥瘡対策と同じ」は英語で「I put a pillow between my knees since they touch together and it hurts. It's the same as preventing bedsores.」と言います。「褥瘡」は英語で「bedsore」と言いますが、医療的な表現は「pressure ulcer」というらしいです。
下肢の筋肉や脂肪が落ちて以来、横向きで寝る時に、膝の骨があたって痛いので枕を間に入れる。
After I lost fat and muscle in my legs, my my knees touch together and it hurts when I sleep on my side, so I put a pillow between them.
カナダ 
