Phyto Performance Cryotherapy Spray for Muscle Pain. Provides immediate and effective relief by causing vasoconstriction and reducing blood supply to the affected area, resulting in reduced pain and inflammation that causes swelling of strained muscles. Instructions for use Cryos Spray Spray directly onto the part of the body that needs it from a distance of 20 cm with short, intermittent sprays. Stop applying the product once a white powder forms.