The average lifespan of a bed bug is four to six months. In cool environments, a bed bug can survive for up to a year. It takes only two weeks for a bed bug to hatch from its egg.
A female bed bug can lay up to 500 eggs in its lifetime. They can lay up to five eggs a day. The egg is tiny but visible to the human eye. The eggs are about the size of a grain of sugar. Bed bug bites can cause skin irritation but they do not spread disease, according the Center for Disease Control.