Frequent blinking in children may be caused by a tic disorder. Tics are uncontrollable movements, and they may be transient or chronic. The "tics" commonly seen may include uncontrollable blinking, facial grimaces, head jerking, muscle twitches, as well as involuntary vocalizations.
【在 B******1 的大作中提到】 : Frequent blinking in children may be caused by a tic disorder. Tics are : uncontrollable movements, and they may be transient or chronic. The "tics" : commonly seen may include uncontrollable blinking, facial grimaces, head : jerking, muscle twitches, as well as involuntary vocalizations.