Ethylchloride Spray provides relief immediately via skin anaesthesia. Pain relieving effect is achieved when compressed ethylchloride within the cannister is sprayed out and evaporates on the skin surface, leading to a coldness and numbness of the sprayed area on the skin, thus relieving pain. 

This Walter Ritter GmbH product manufacture does not contain any propellant and is handy to use.

For the relief of deep muscle pain, hold the container 12-18 inches (30-46 centimeters) away from the muscle, then spray in a sweeping motion at the rate of 4 inches (10.2 centimeters) per second until the entire muscle is covered from the trigger point to the area of pain. The muscle will be slowly stretched during this process until full motion is restored and pain is relieved.

For use on skin only. Do not apply to broken skin or mucous membranes (e.g., inside the nose or mouth). Do not spray into eyes. Do not inhale the spray.