When you shave, the hair grows back thicker, darker, and coarser than before.
Shaving removes hair at the skin surface, not at the root, so it cannot affect the thickness of newly growing hair. The appearance of thicker regrowth is due to the blunt edge created by shaving compared to the naturally tapered tip of unshaved hair. Hair also appears darker against skin when it first regrows because it hasn't been bleached by sun exposure.
Reception
Sources
- Dermatology Times: Hair and Shaving REFERENCE
- Mayo Clinic: Shaving Myths REFERENCE