Rub some leave in conditioner into the knotted area. This will
help the hairs slip loose easier. Hold the hair firmly in your hand
above the knot so it does not pull your scalp. Use a comb. Start at
the bottom of the knot, and slowly start with a small section, and
comb it out. Just keep working your way up further into the knot.
Take your time, and just keep going until the knot is worked
through. It may want to reknot for a few days after, so just be
sure to take extra time combing or brushing through this area for a
few days, until it starts laying flat with the rest of your hair
again.