Anything in excess and everything in limitation results into possible concerns. This is what many among us have noticed as well. Hence yes sleep deprivation also termed as insomnia is basically that act where the body goes through insufficient amounts of sleep. It has in many cases shown to have negative consequences on the body, which can lead directly and indirectly to conditions of hair loss and thinning hair. There are pre-existing conditions also which might be adding to the concerns together.