Objective To explore the effect of cellphone use duration and habits（e.g.one-hand holding

twohand holding

one-finger operating

or multi-finger operating）on the incidence of "cellphone disease"（typically characterized by stenosing tenosynovitis）.Methods By random sampling

aquestionnaire survey was conducted on an online platform（Sojump Online Questionnaire Platform）and also in community residents of Hefei.Meanwhile

30 students randomly selected from Anhui Medical University（15males

and 15females）participated in a field experiment of " effect of cellphone use duration and habits on hands".Results 48% of respondents reported 4

8

huse of cellphone daily;92% reported that the time mainly spent in chat tools;84% reported the habit of one-hand holding;After long-term use of cellphone

38% experienced stiff and swollen fingers

red and swollen wrist

and/or finger joint nodules.In the field experiment

no symptoms of hand discomfort was observed after 2huse of cellphone;but such symptoms was noted in about 10.0% of subjects after 4

6

h;and then up to 16.7% of subjects after 8

1

0h.Subjects who played games or used chat tools had the highest risk to experience hand discomfort（13.3%）

while those who watched videos were at a lower risk.Conclusion The incidence of "cellphone disease" increases with the time of cellphone use.Habits like two-hand holding and multi-finger operating are more likely to induce " cellphone disease".Cellphone users should keep agood habit with proper postures

and have a rest whenever possible

so as to reduce the risk of "cellphone disease".