Is it true your heart stops when you sneeze that's why people say bless you?

It’s a common myth that your heart stops when you sneeze, but this is not true. When you sneeze, the body undergoes a series of reflex actions that may cause a temporary change in heart rate, but the heart does not actually stop. The phrase "bless you" is thought to have originated as a response to the sneeze, possibly as a way to wish someone health or to protect them from evil spirits during a vulnerable moment.