Patients with pink wristbands are generally not very serious. The pink wrist band mainly refers to patients with restricted limbs, that is, arms or other limbs, such as swelling or severe pain that prevents patients from handling intravenous injections or injecting blood pressure cuffs. Hospitalized patients wear wristbands so that doctors can verify the patient's identity, and some identification wristbands have QR codes that are convenient for mobile devices. This QR code can record the patient's basic information, including name, age, blood type, ID number, etc. It also includes some medical information such as medical history, which can help doctors comprehensively understand the patient and conduct more accurate diagnosis and treatment.