These knots are usually found on the lower part of the hair strand with fractures at the cuticle and exposure of the cortex where these knots form. These knots are weak points on the hair strand since the cuticle layers are now bent into a knot shape, they simply intertwine with itself or other strands of hair, making detangling natural hair even more complicated, they are normally on one strand of hair, or more than one strand all together in one knot. Some people cut/trim the hair above the knot to get rid of it, I do not do this, because I want to show length. This is every naturals nightmare, but chill out! Everything will be okay! lol
The tendency of our curly/spiral hair to tangle may lead to loose knots which are pulled tighter by friction and grooming (Scott, 1988) techniques like combing, and brushing. So the things we do can sometimes make our knots tighter. Also, when our hair sheds daily. The loose hair can tangle with our other hair making a knot as well. The shedded hair is saying, "I'm not ready to leave yet!" and it has it's way of holding on...lol
Try these things! It may help in the Long Run...
3. Styling should prevent friction and NOT creation. Wearing the hair up means that hair is in a fixed position and is not forming meet and greet knots with all of the other spiral hair strands. This is a hard one because I like wearing my hair out and intend to do so when it gets to my desired length. However, because I know when my hair is out it means that it’s freely moving around tangling with other hair, I should keep it really moisturized so I can finger comb out any loose knots that may form into tighter ones.
4. Wrap up your hair at night with a satin scarf, or satin hair bonnet. Satin slides against the hair, unlike cotton (mainly pillow cases) which grabs the hair, and can break it, or knot it up more. If you have time, try twisting your hair into flat twist or two strand twists with moisturizer at night. This helps the hair in more ways than you know. Remember: Hair that's free during the night will be tangled and knotted in the morning.