"Tù xuè" (pronounced tù xuè, not qìn xuè — the user-provided pinyin is incorrect) means "to vomit blood," a serious medical symptom indicating bleeding in the upper gastrointestinal tract or respiratory system. The first character 吐 (tù) means "to spit out" or "to vomit," and 血 (xuè) means "blood." Together, they form a compound verb describing the forceful expulsion of blood from the mouth, often due to conditions like gastric ulcers, esophageal varices, or severe lung infections.

This term is used exclusively in formal, clinical, or urgent contexts — never casually or humorously. It appears frequently in medical reports, emergency descriptions, and health education materials. Because it signals life-threatening illness, it carries strong connotations of severity and urgency. Learners should note that it is not interchangeable with general terms for bleeding (e.g., 出血 chūxiě) or coughing up blood (咳血 ké xiě), which involve different anatomical origins and mechanisms.