According to who's pain rating scale

According to who's pain rating standard, it is generally mild pain from grade 1 to grade 4, which is within the tolerance range of the body and will not cause much impact on normal life. Grade 5 to grade 6 is moderate pain, which is obvious at this time and has affected your quality of life. Grade 7 to grade 10 is severe pain, which is very intense and has seriously affected sleep, and may also cause autonomic nerve dysfunction.