I tend to get knots underneath my hair and at the very top back layers. When if find i have a lot i apply a little oil to the curls that are knotted, lightly rub it in, and then lightly pull the curl apart to release the knots. the oil helps the knot the slide out and reduces friction to help keep it from breaking. try to brush your hair the least amount possible and stick to finger combing. keeping your hair moisturized, trimming out excessively dry and clearly damaged ends, and reducing damaging heat tools, hair colours, and hair brushes will help keep knots to a minimum.