'Dù zi téng' literally means 'stomach hurts' — it's a compound noun formed from 肚 (dù, 'stomach' or 'belly'), 子 (zi, a common noun suffix that makes the word more colloquial and concrete), and 疼 (téng, 'to hurt' or 'ache'). Unlike formal medical terms like 胃痛 (wèi tòng, 'gastric pain') or 腹痛 (fù tòng, 'abdominal pain'), 肚子疼 is everyday spoken Chinese used by children and adults alike to describe general abdominal discomfort — whether from indigestion, gas, hunger, or mild illness.

This term is neutral in register but leans informal; it’s commonly heard in homes, clinics, schools, and conversations about minor physical complaints. It does not specify location or cause precisely — it’s a broad, accessible way to say 'my stomach hurts.' Parents often use it when asking young children how they feel, and doctors may use it as a starting point before clarifying symptoms.