How do I attach a trail to an object

I want to make a blood trail (partical) for a physical object how do I attach it to him?

Thanks

Pin behaviour

Give the effect a pin behavior and then in whatever event causes the blood effect use action Object (to pin) pin to Object (object to pin too).. you choose the image point and you can make more in sprite builder. You can also play around with the pin to angle options depending on what your doing.