If you mean chlorine bleach stains, there’s an important catch: bleach usually doesn’t leave a removable “stain”—it removes the fabric’s dye. So washing the area generally won’t restore the original color.
Two practical tricks:
For a tiny spot: If the fabric is colored, use a fabric marker or fabric dye that closely matches the original color. Test it on an inconspicuous area first.
For a larger area: Re-dye the entire garment with a suitable fabric dye. This can give a much more even result than trying to color individual bleach spots.
If the bleach has just spilled, rinse the fabric thoroughly with plenty of cool water and wash it according to its care label. Never mix bleach with vinegar, ammonia, or other household cleaners, because dangerous gases can form.
If you tell me the fabric type and its original color (e.g., black cotton shirt), I can suggest the safest way to repair it.
