“The key to flat-twists is to start with dry, stretched hair. When twisting, make sure to use the right amount of tension without making them too tight. You should never feel pain around your edges or scalp. If you see little bumps along the hairline or have a headache when you’re done, you’re doing them too tight and could end up with hair loss,” says Groover. If you’re not an expert at creating flat-twists, YouTube can be a great resource for learning twisting techniques.