Originally Posted by
rayman
Ingrown hairs are a byproduct of and caused by the modern day multiblade safety razor and some electrics.
The engineering behind these new multibladed razors is a great example of one size fits all. They are engineered with the assumption that if all faces, and legs, aren't the same, then we must produce a product that makes them that way.
The blade holder is made so that its frame, when pushed down on the skin, forms a flat and relatively tight surface for the blades to work on. Thus, no matter how your face is configured, thier blade will work.
The next thing are those multiple blades. All of them are not designed to cut. Just the last one cuts. The rest are in place, and at an angle designed to grab and pull the hair out, until the last one cuts it. What happens next is what causes the ingrown hair!
After the last blade cuts the hair, the hair is released and allowed to pop back into the hole it came out of. In some cases the hole tries to grow shut and the hair keeps trying to grow. Thus the ingrown hair.
Ray