In medicine and psychology,<unk>  is a sign or symptom typified by exaggerated changes in mood or affect in quick succession. Sometimes the emotions expressed outwardly are very different from how the person feels on the inside. These strong emotions can be a disproportionate response to something that happened, but other times there might be no trigger at all. The person experiencing<unk>  usually feels like they do not have control over their emotions. For example, someone might cry uncontrollably in response to any strong emotion even if they do not feel sad or unhappy.<unk>  is seen or reported in various conditions including borderline personality disorder, histrionic personality disorder, hypomanic or manic episodes of bipolar disorder, and neurological disorders or brain injury (where it is termed pseudobulbar affect), such as after a stroke. It has sometimes been found to have been a harbinger, or early warning, of certain forms of thyroid disease.<unk>  also results from intoxication with certain substances, such as alcohol and benzodiazepines. It can also be an associated feature of ADHD. Children who display a high degree of<unk>  generally have low frustration tolerance and frequent crying spells or tantrums. During preschool, ADHD with<unk>  is associated with increased impairment and may be a sign of internalizing problems or multiple comorbid disorders. Children who are neglected are more likely to experience<unk>  dysregulation, including<unk> . Potential triggers of<unk>  may be: excessive tiredness, stress or anxiety, over-stimulated senses (too much noise, being in large crowds, etc.), being around others exhibiting strong emotions, very sad or funny situations (such as jokes, movies, certain stories or books), death of a loved one, or other situations that elicit stress or strong emotions.
Emotional lability
Callous and unemotional traits
Sexual anhedonia
Unipolar emotions
Body image disturbance
Body integrity dysphoria
Musical anhedonia
Hyperreligiosity