VAS is one of the commonly used pain scoring criteria, the full name is Visual Analogue Scoring, which divides pain into 10 points, with 0 indicating no pain, 10 indicating severe pain, and the middle part indicating different levels of pain. Patients are asked to draw marks on the horizontal lines according to how they feel, which are used to indicate the degree of pain, with 1-3 points representing mild pain, 4-6 points representing moderate pain, and 7-10 points representing severe pain. Mild pain can be analgesic with non-steroidal anti-inflammatory drugs such as celecoxib, moderate pain can be analgesic with tramadol injections, and severe pain means that the pain has become very pronounced and requires strong opioids such as morphine and oxycodone.