'Your body has a physical ‘memory’' — doctors share the 5 reasons why I found it impossible to sleep over the holidays

A brunette woman with a ponytail sitting on the bed of her childhood bedroom.

I've always thought that insomnia has one root cause and, once that cause is eliminated, there'll be no more restless nights.

So, when I experienced a bout of insomnia while staying with my family over Christmastime, I kept searching for what the problem was so I could fix it and get some rest.