Here's why:
* Increased risk of ingrown hairs: Shaving against the grain can cause hairs to curl back into the skin, leading to painful and potentially infected ingrown hairs.
* Skin irritation and razor burn: Shaving against the direction of hair growth can cause more friction, increasing the chances of skin irritation, redness, and razor burn.
* Increased risk of bleeding: Going against the grain can make it harder to shave close to the skin, leading to more passes with the razor and a higher risk of cuts and bleeding.
Instead, always shave with the grain (in the same direction as hair growth). This minimizes the risks mentioned above and leads to a safer and more comfortable shave for the patient.