A scratch or nosebleed can leave a blood stain on a favourite shirt or bedsheet. Blood stains on fabric and clothing are among the many irritating nuisances people encounter in daily life. If the stain is still wet, rinse it with cold water and rub it with liquid detergent or bar soap. On the other hand, when a blood stain is not noticed immediately and dries, it can become more difficult to remove. The University of Georgia Extension notes that blood stains set by heat can be difficult to remove.
The University of Georgia Extension recommends a step-by-step method for old and stubborn blood stains. First, soak the item in cool water for 30 minutes or longer. If the stain remains, soak it for another 30 minutes or longer in lukewarm water with an enzyme pre-soak product. Rinse the garment, rub detergent into any remaining stain, and rinse again. If the stain remains, apply a few drops of 3% hydrogen peroxide for 1 to 3 minutes, rinse thoroughly, and launder the item.