Teeth hand shake a little loose, loose degree in 1 millimeter or so belongs to the normal physiological phenomenon; loose degree is greater than 1 millimeter may be periodontitis, dental trauma, loss of milk teeth, and so on. 1. Normal physiological phenomenon: normal teeth have a certain degree of physiological activity, hand shaking general loosening amplitude of about 1 millimeter. 2. Periodontitis: periodontitis when calculus compression of the gums, resulting in gingival recession, alveolar bone resorption, attachment loss, etc., to the late periodontitis by shaking the teeth with the hand will appear loose teeth, loosening degree is generally greater than 1 millimeter. 3. Dental trauma: dental trauma, teeth will appear a certain degree of loosening, trauma force is different, the degree of loosening of the teeth with hand shaking is not the same. 4. Loss of milk teeth: milk teeth are lost due to root resorption, the teeth will be a little loose when shaken by hand. Teeth with the hand shake a little loose, timely to the hospital, clear physiological factors or pathological factors, and then active treatment is conducive to the recovery of the condition.