Sewn-in extensions are typically made from human hair, which means that they are good quality but very delicate. To attach extensions, a stylist braids hair along the scalp, then sews tracks of hair into the braids. Proper care will make your extensions last longer and look better. By washing, conditioning, styling and gentle handling, your extensions will last the six to eight weeks that they should.

Oil your scalp whenever your scalp feels itchy because of the the tight braids. Spread a little coconut oil on your fingertips and apply it to the affected areas of the scalp. Do not scratch at your head, which can result in frizzy roots and noticeable tracks.

Wash your hair extensions every seven to 14 days. Choose a shampoo that is high quality and gentle, such as a baby shampoo or sulfite-free product. Condition your hair each time you wash your extensions.

Pat your hair dry after getting out of the shower, because rubbing it dry with a towel with roughen the hair cuticles and cause messy hair shafts. Always allow your extensions to dry before you go to bed; sleeping on wet hair extensions can damage them. If possible, sleep on a silk pillowcase or with a silk scarf to protect your hair from pillow friction.

Style your hair carefully. When detangling your hair after a shower, start with the bottom of the extension and work your way up to reduce pulling at the hair. Never perm or color hair extensions on your own. If you want another style or color, your stylist can sew in extensions that already have the style and color you want. Use heated styling tools sparingly to prevent extensions from becoming dry and brittle.

Schedule an appointment with your stylist six to eight weeks after the extensions are sewn in. Your stylist can remove them or place filler tracks in the braids to update your look. If your hair shows signs of damage, such as broken hair at the roots, ask the stylist to remove the braids and allow your hair to rest for at least six months.