Using a hot hair dryer will force bed bugs out of their hiding places but will not kill them. The best way to kill bed bugs is to clean and/or eliminate the places they hide, such as bedding or cracks in furniture.
Bed bugs are insects that feed on human blood. They are often unknowingly brought into the home in bedding, clothing or furniture. Bites from bed bugs are usually painless and affect only the surface of the skin. While bed bugs are a nuisance, they do not spread disease. Consulting a professional is recommended before using pesticides to kill bed bugs.