Objective To analyze the prevalence and influencing factors of acne among students in a university in Shandong Province

so as to provide evidence for the prevention and treatment of acne. Methods From October to December 2019

The method of stratified cluster sampling was used. A total of 5 768 undergraduates and postgraduates were selected from a university in Shandong Province to carry out a questionnaire survey for the prevalence of acne. Results There were 2 020 acne patients in this study

with a prevalence rate of 35.02%. The prevalence rate of boys was 37.54%

which was higher than that of girls（32.79%）（P<0.05）. The difference of acne prevalence rate among different grades was also statistically significant（P<0.05）. Among the subjects with acne

there were 1 573 cases of grade Ⅰ（77.87%）

408 cases of grade Ⅱ（20.20%）

25 cases of grade Ⅲ（1.24%） and 14 cases of grade Ⅳ（0.69%）. The results of Logistic regression analysis showed that family history of acne

the time to fall asleep every night

daily sleep time

physical exercise

daily exposure to electronic screen

diet preference

skin type

daily facial cleaning times

facial cleaning materials

long-term life exposure

constipation

study and life stress

and drinking habits were all influencing factors of acne（P<0.05）. Conclusion Acne is a chronic inflammation of the face caused by a variety of factors

which seriously affects the psychology and social interaction of patients

which can also easily lead to lower learning efficiency and affect patients’ quality of life. Health education should be strengthened for college students to guide them to change their bad lifestyle in order to eliminate the risk factors

so as to reduce the incidence of acne and prevent recurrence.