Whether you can bleach a curly human wig depends entirely on its material—human hair wigs can be bleached (with caution), while synthetic wigs cannot (bleaching will destroy them).

1. Human Hair curly human wigs: Bleaching Is Possible, But High-Risk
curly human wig are made of real hair, so they can technically be bleached like your natural hair. However, the process has significant downsides that often outweigh the benefits, especially for curly styles:
- Damages curls permanently: Bleach strips hair of moisture and protein, which is critical for maintaining the bounce and shape of curly hair. Your short curls may become frizzy, limp, or lose their defined texture entirely.
- Increases breakage: Short hair has less length to absorb damage. Bleaching can make the wig fibers brittle, leading to split ends or breakage—this is harder to hide with a short style.
- Requires professional skill: At-home bleaching often results in uneven color (e.g., patchy blonde) or over-processing. Curly hair also needs extra care during bleaching to avoid uneven texture, so a stylist experienced with wigs is recommended.
- Shortens wig lifespan: Even with proper care, bleaching will weaken the hair fibers, reducing how long the wig lasts (human hair wigs typically last 6–12 months with regular use; bleaching can cut this in half).

2. Synthetic curly human wigs: Bleaching Is Impossible
Synthetic wigs are made of artificial fibers (e.g., polyester, kanekalon). Bleach is a strong chemical that will not lighten these fibers—instead, it will:
- Melt or deform the fibers: Synthetic materials are heat and chemical-sensitive. Bleach can break down the fibers, causing the wig to melt, shrink, or lose its structure.
- Discolor unevenly: Instead of lightening, bleach may turn synthetic hair yellow, orange, or even a murky gray—results that are impossible to fix.
- Ruins the wig entirely: Once damaged by bleach, synthetic wigs cannot be repaired and will need to be replaced.

If you want a lighter color for your curly human wig, bleaching is not the best option—even for human hair. Safer alternatives include:
- Using semi-permanent or demi-permanent hair dye (for human hair wigs): These are gentler than bleach, deposit color without stripping fibers, and are less likely to ruin curls.
- Buying a pre-colored wig: This avoids any damage to your existing wig and guarantees even color and intact curls.