What can cause scalp irritation during a shave?

Scalp irritation during a shave can indeed be caused by the use of dull blades. Dull blades do not provide a clean cut, which can lead to tugging and pulling at the hair rather than slicing through it smoothly. This unnecessary friction can irritate the skin, resulting in redness, soreness, and even the potential for nicks and cuts.

In contrast, sharp blades glide over the skin more effectively, reducing irritation and providing a smoother shave. Proper maintenance of blades is crucial for both the quality of the shave and the health of the scalp. Keeping blades sharp minimizes the risk of irritation and enhances the overall shaving experience.

While excessive pressure, hot water, and frequent shaving can cause irritation as well, they do not directly relate to the sharpness of the blade, which is a critical factor in preventing damage to the skin during the shaving process. Each of these factors can contribute to discomfort but the choice highlighting dull blades directly ties into the mechanics of cutting hair and their impact on skin health.