Oriental rugs should be cleaned with caution.Do not use carpet spot cleaners on oriental rugs as it will damage the fibers.It may work, especially if it’s your own blood. If nothing else works, try spitting on it.Use the bottom of a spoon to gently work cleaning solutions into the carpet without damaging the fibers.Do not use bleach or ammonia on wool carpets as it will damage the fibers.Do not use laundry detergent or dishwasher detergents as they may damage the fibers of your carpet.Avoid using warm water, it speeds up the setting process and makes the blood stain more difficult to remove.Rinse by blotting with a clean, damp towel. Pour salt on the stain and blot with a towel dampened with hydrogen peroxide solution (2 parts water to 3 parts hydrogen peroxide).For baking soda and meat tenderizer, make a paste using cold water and apply to the stain.The following common household items can be used to remove blood stains: baking soda, meat tenderizer, salt, or hydrogen peroxide along with cold water.Apply the solution on the dried spot and blot to dry. If the spot turns brown when it dries, mix 1 part vinegar with 2 parts water.When spot has dried completely, vacuum thoroughly to restore carpet texture and pick up any remaining cleaning solution residue.Remove weights and cloths and let area air dry.Leave set for several hours to absorb any remaining liquid.Cover stain with clean cloth or stack of paper towels and put heavy weight on top (heavy books, etc.).Repeat as necessary to be sure all cleaning solution has been removed. Repeat steps 4 and 5 until the stain is no longer noticeable.
You will need to change your cloth often or use a clean patch of the towel each time as you are blotting to be sure you are not spreading the stain.
Also be sure throughout the process to blot the stain, not rub it, as this will only push the stain further into the carpet fibers. Dried blood stains are notoriously harder to remove. It is easiest to remove blood when it is still wet.
You may want to try a test application on a small, hidden spot to be sure it does not damage the color or fibers of your carpet. Blood stains can be especially difficult to remove because the hemoglobin in the blood acts as a binder when it contacts oxygen and binds with the material in the carpet.