Your hair will be damaged once you curl it with chemical process, so you should pay more attention and give more special care to your curl hair, and there are some thing you can do to protect your curl hair from worse damage when you go to salon. 1.Trim your hair monthly or every two months for healthy hair. Trim your hair monthly or every two months for healthy hair. Thick hair often suffers from split ends, which can make full hair go limp. Every 6-8 weeks (or when your hair seems stringy), visit your stylist for a quick trim. Cutting wavy, thick hair can be difficult, so unless you are a professional, visit a stylist familiar with curly hair. Trims are important to reduce split ends. If you do not get your hair trimmed, the split end may eventually cause your hair strand to break off.2.Ask your stylist to take the bulk out of your hair. Ask your stylist to take the bulk out of your hair. Thick hair, especially when paired with curls, can easily weigh down your head. Instead of asking your stylist to remove one or two inches (2-5 cm), ask them to remove extra weight.