We’ve got insider intel on your hair dresser. She or he may know everything about your life, from all those times you’ve talked while in their chair, but here’s what you should know about the person doing the cutting:

• First: Just because they have a license to cut hair, doesn’t mean they’re any good at it. That’s because, in most states, the only requirement for a license is to spend about 1,000 hours cutting hair. There’s no proficiency test. So your best bet of avoiding an embarrassing hair disaster is seeing an experienced stylist, one who comes recommended by a friend or a review site like Yelp. 

• Another stylist secret: If they offer you a free conditioning treatment, that’s code for “I’m running really late.” Hairdressers often overbook to guarantee a steady flow of business. And when they’re overscheduled, a common trick is to make clients wait without realizing they’re waiting. For example, they’ll offer you a complimentary conditioning treatment. And while you’re under the dryer for 30 minutes, they’ll sneak in another client’s haircut.

• Hair stylists also talk about your deepest, darkest secrets. Surveys show that 40% of people share personal information with their stylist, like relationship or work problems. And odds are, they’re sharing those private conversations with their other clients. So, only tell your stylist something you’d feel comfortable if your entire town knew.

• And, did you know that your stylist can save your life? They’re in a prime position to spot signs of domestic abuse, depression, or even skin cancer. That’s why a lot of stylists are getting training to help point people in the right direction if they see something wrong.