In a prospective study of 23 newborns with preauricular skin lesions, four (17 percent) had abnormal findings on brain-evoked response audiometry. 1 Another study of 178 newborns with isolated preauricular tags found that 23 (13 percent) had mild to moderate sensorineural hearing impairment.
Hunger is one of the most common reasons why your baby will cry (CKS 2014), especially if she's a newborn. The younger your baby is, the more likely it is that she's hungry. Your baby's stomach is small and can't hold very much. So it won't take long before it empties.
Why do babies cry to fight sleep? It is well known that babies cry just before sleep. Sometimes the cries have specific origins that cause pain or discomfort. But as everyone knows, even when all those factors have been eliminated every baby still appears to cry in an attempt to fight sleep itself. This question is NOT asking for a solution. This is a scientific question.