‘验血’ literally means ‘test blood’ and refers to the medical procedure of analyzing a blood sample to assess health, diagnose disease, monitor treatment, or screen for conditions. The character 验 (yàn) means ‘to test’, ‘to examine’, or ‘to verify’, while 血 (xuè) means ‘blood’. Together, they form a compound noun used exclusively in clinical or healthcare contexts—not in daily casual speech outside medical settings.

This term is commonly used when discussing routine check-ups, hospital visits, or symptoms prompting lab investigation—for example, before surgery, during pregnancy, or when investigating fatigue or infection. It’s neutral in register, appropriate for both spoken and written Chinese, and appears frequently in doctor–patient conversations, medical reports, and public health information. Unlike broader terms like 检查 (jiǎnchá, ‘examination’), 验血 specifically denotes laboratory-based blood analysis—not visual inspection or physical palpation.