As someone who has sensitive skin, it took me about five years of experimentation before I was able to achieve a super close shave with zero irritation. Even now I will occasionally get minor irritation if something is not quite right. Those with sensitive skin need to focus on several things:
1. Beard and skin preparation. Your beard needs to be clean and hydrated to make it easier to shave. I accomplish that by showering immediately before shaving.
2. You need to use a high quality soap and hydrate it properly to provide a high level of slickness, including primary slickness and residual slickness. That minimizes the friction between your razor and your skin. The lather also needs to provide a cushion of protection between your blade and your skin. Some soaps also contain ingredients to soothe, moisturize and condition your skin. If you are using the wrong shaving soap, you might not get a great shave.
3. You need the right razor combined with the right blade for your beard and skin. If your blade is not sharp enough to cleanly sever your beard or the blade feels rough on your skin, you will get irritation. Different blades tend to work best in different razors. If you have multiple razors, the same blade might not be optimal for each of them.
4. Finally, your technique has to be excellent; that means shaving with the correct shave angle and minimal shave pressure. Every razor has a shave angle that works best. I suggest trying to shave "off the cap" to achieve a lower blade angle to see if that helps with the irritation. Some people like shaving with a steep blade angle, but I find a shallow blade angle cuts better with less irritation.If your blade is not sharp enough, many shavers attempt to compensate by increasing the pressure. That just increases irritation. If the blade is not cutting, replace it with a new blade. If the new blade is not cutting, try sharper blades.
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