How to Know When It’s Time to Replace Your Razor Blade

Many people wait until their razor blade is visibly dull or rusty before replacing it. But the truth is, there are several warning signs that indicate it’s time to change your blade—even if it still looks fine on the surface. Shaving with a worn-out blade not only reduces the quality of your shave but can also damage your skin, cause cuts, and even lead to minor infections.

One of the first signs is the increased need to apply pressure during shaving. If you find yourself going over the same area multiple times or pressing harder than usual to remove hair, it means the blades have lost their efficiency. According to studies published in the Journal of Cosmetic Dermatology, excessive pressure from a dull blade can damage the epidermis and lead to breakouts and inflammation.

Another clue is a burning or irritating sensation after shaving, more intense than usual. A worn blade often fails to make a clean cut, leaving hairs unevenly trimmed. This can cause ingrown hairs and irritation of the hair follicles. If your skin feels unusually red or sensitive after shaving, your blade might be the culprit.

Rust, discoloration, or a strange odor are also clear signs of blade degradation and microbial growth. Storing your razor in a damp environment (like a bathroom) and not drying it properly accelerates oxidation and contamination. Shaving with a rusty blade can cause microscopic cuts and, in rare cases, infection.

Many dermatologists recommend replacing blades after 5 to 7 uses if you’re shaving daily. Even if there are no obvious signs of damage, using a blade beyond this point can reduce performance. Dullness happens gradually, and you might not notice it—but your skin will.

Lastly, if your shave just doesn’t feel as smooth or clean as it used to, or you’re not satisfied with the result, it’s probably time for a new blade. Paying attention to these subtle signs not only protects your skin but also makes the shaving experience much more enjoyable.