What can cause skin irritation after shaving?

Skin irritation after shaving can indeed be caused by ingrown hairs or improper technique. When hair is shaved too closely or against the natural growth pattern, it can lead to hairs curling back into the skin, resulting in inflammation and bumps known as ingrown hairs. Additionally, using improper techniques, such as applying too much pressure or not using enough lather, can increase friction on the skin, leading to irritation and discomfort.

In contrast, using high-quality shaving products typically helps to minimize irritation by providing better lubrication and nourishment for the skin. Shaving with the direction of hair growth is also a recommended practice to reduce irritation and prevent ingrown hairs, as it allows for a smoother shave and less trauma to the skin. A dull blade tends to pull the hair rather than cut it cleanly, which can lead to greater irritation; however, it is less directly associated with technique or the phenomenon of ingrown hairs compared to the factors highlighted in the chosen answer.