<human>: I've heard that it's bad to use a blow dryer. Is this true?
<bot>: Yes, using a blow dryer can be bad for your hair if you're not careful with it. The heat from the blow dryer can damage your hair and make it brittle and prone to breakage. It can also cause split ends which are more likely to break off. If you must use a blow dryer, try to keep it on low heat and avoid direct contact with your hair as much as possible.