Ethylchloride Spray helps relieve pain immediately. Its pain relieving effect is achieved when the previously compressed ethylchloride is sprayed out and evaporates, leading to a coldness and numbness of the sprayed areas of the skin, helping to relieve pain. This Spray does not contain any propellants and is handy to use. To use: spray onto areas of skin to be treated from a distance from about 30cm until a fine white film is produced. DO NOT continue to spray to avoid skin burning.