It seems that she suffers from bruxism.Bruxism is the habit of either grinding your teeth or clenching your jaw. Itâs not the same as normal teeth grinding though, such as when eating. It happens involuntarily and automatically.
Regards Dr. Ratnika Agrawal, Smile Up Dental Care & Implant Center of Kharadi in Pune
Next Steps
Most kids outgrow bruxism, but a combination of parental observation and dental visits can help keep the problem in check until they do. In cases where the grinding and clenching make a child's face and jaw sore or damage the teeth, dentists may prescribe a special night guard. Molded to a child's teeth, the night guard is similar to the protective mouthpieces worn by athletes. Though a mouthpiece can take some getting used to, positive results happen quickly.