Help. I need somebody

Why do we often call problems at the beginning of something 'teething problems'? When i struggle i don't try to eat the problem. Is it because teething problems are the first we encounter in our lives? If so, it's very inaccurate, there are many problems for babies before teething (and after) here Starbucks will act some out:

 The i need to breathe for the first time problem.

 

 The why am i not living in a water sack problem.

 

 

 The I've been awake a whole hour and am now suddenly, unbelievably tired problem.

 

The i don't want to wear this hat problem.

 

 The what is that horrible crying noise problem.

 

The snow is trying to attack me problem.

 

 

 

The i don't want to be carried, pushed, crawl or sit still problem.

 

The this doesn't taste like pizza problem.

 

Thank goodness its easier to be an adult....