noun
throughout the body; all over the body
Describes something happening or being felt across the entire body.
風邪で身体中が痛い。
My whole body aches from the cold.
マッサージの後、身体中が軽くなった。
After the massage, my whole body felt lighter.
全身 is a more formal, medical term for 'whole body', while 身体中 is a common, everyday expression.
Compound of 身体 (body) and 中 (throughout, inside).