A BRUE is a description of a self-limited episode. Usually a BRUE lasts for less than 1 minute. By definition, the episode must have<unk>  by the time the infant is evaluated by a medical professional. The caregiver may report observation of bluish skin discoloration, called cyanosis. Breathing abnormalities, such as lack of breathing, slow breathing, or irregular breathing may be noted. Differences in muscle tone, such as transient floppiness or rigidity can also be characterized as a BRUE. Changes in level of responsiveness such as abnormal eye contact or inability to interact can also fulfill the classification. A BRUE is a term used by a clinician to characterize an infant's self-limited episode witnessed by someone else. The AAP defines a BRUE as a sudden,<unk>  episode that occurs to infants less than 1 year of age, lasts less than one minute, and<unk>  completely on its own prior to being evaluated by a health professional. The<unk>  must include at least one of the following: * skin color change to blue (cyanosis) or pale (pallor) * abnormal breathing * muscle weakness * decreased responsiveness
Brief resolved unexplained event
Acute behavioural disturbance
Acute muscle soreness
At risk mental state
Fatal insomnia
Headache attributed to a substance or its withdrawal
Paroxysmal attack
Chronic condition