This question can fill volumes so I am going to tackle the two most prevalent aspects to what will happen if you lie.

Health Ramifications
Most of us can remember when we last told a lie, or when the lie required you to recall details of what it was about. You may recollect feeling stressed, anxious and actually having an adverse physical reaction because you had to guess at the specifics of the lie? What’s even more daunting is what you thought was believed to have been forgotten, may now be overwhelming your thoughts despite your efforts to forget about “it”.

Psychology researchers at the University of Notre Dame conducted a 10-week study on a group of 110 individuals, half of which were asked not to lie, and the other half told to keep track of how many times they actually lied. [1]
The researchers followed each participant’s mental and physical health with survey’s …show more content…
Increased Stress
Most of us already know that stress damages your brain and body in numerous unpleasant ways. When the body is under stress, muscles tense. Muscle tension is fundamentally an automatic reaction to stress – it is your body's way of defending against pain and injury. Subsequently, lying contributes to your body’s stress level, as you do it so habitually throughout the day, you need to consider the long-term impact of your continuous lying on your overall health. The day-to-day damage isn't normally obvious, but it readily exists in the frequent health issues you will encounter throughout your life.

With stress, your muscles tense up and release physical and chemical tension when the stress subsides. Chronic stress may cause muscles in your body to be in a relatively constant state of readiness. When muscles are tight for exceptionally long periods of time, it can activate other effects in the body and even activate stress-related illnesses. As an example, both tension headaches and migraines are interconnected to prolonged muscle tension in the area of the shoulders, neck and