Emotional lability

In medicine and psychology, emotional lability is a sign or symptom typified by exaggerated changes in mood or affect in quick succession.

For example, someone might cry uncontrollably in response to any strong emotion even if they do not feel sad or unhappy.

[12] Children who display a high degree of emotional lability generally have low frustration tolerance and frequent crying spells or tantrums.

[2] During preschool, ADHD with emotional lability is associated with increased impairment and may be a sign of internalizing problems or multiple comorbid disorders.

[13] Potential triggers of emotional lability include excessive tiredness, stress or anxiety, overstimulated senses (too much noise, being in large crowds, etc.