Nature happens, yet one wrong move could leave things permanent. I've done the hard part and now you can save a favorite pair of highlighter orange Adidas shorts from a two year old blood stain.
If stains are frequent guests, do yourself a favor and stock up on
Dr. Beckmann's Stain Devils. They are available as specifically formulated stain removers: Wine & Fruit, Blood, Fat & Sauces, Dirt & Grass, Ink & Paint etc. You just add a bit to the affected area and throw it into a machine or hand wash right away. Make sure to initially wet the area beforehand.
Other alternatives are either experimenting with homemade vinegar and baking soda paste ratios or authentic stain-removing
bar of soap as ancient as old wives' tales.