Tag: Micrognathia

While many facial traits are common, an absent or severely underdeveloped chin is an extremely rare congenital condition associated with specific genetic syndromes. Answering the question 'Which type of chin is rare?' requires distinguishing between normal variations and significant medical conditions affecting facial bone development.

Genetics is the most common reason for a weak chin, but it isn't the only factor at play. Understanding what are the causes of a weak chin can provide valuable insight into facial harmony, overall health, and the underlying skeletal and soft tissue dynamics.

According to Nationwide Children's Hospital, micrognathia occurs in about 1 in every 1,500 births. This condition, colloquially referred to as a **micro jaw syndrome**, involves an underdeveloped or smaller-than-normal lower jaw and can significantly impact an infant's feeding and breathing.