Device for dispensing one or more skin treatment substances, comprising a formula for the treatment of rhagades and small injuries, and also for the cure and treatment of other skin diseases, said formula including eugenol and panthenol, said device also comprising a reservoir for the treatment substances, a dispensing element suited to dispense the substances onto the skin, a valve suited to properly connect said reservoir to said dispensing element, and wherein said valve comprises: - a dosage chamber having a predetermined volume suited to contain one portion of the treatment substances, - substance passage means suited to alternatively place said dosage chamber in fluid communication with said reservoir in order to fill it or with said dispensing element in order to dispense the treatment substances. and wherein said passage means comprise: - a filling path suited to fill said dosage chamber and first closing means suited to selectively obstruct said filling path while the treatment substances are being dispensed; - an outlet path suited to empty said dosage chamber while the substances are being dispensed and second closing means suited to selectively obstruct said outlet path while said dosage chamber is being filled; - a stem slidingly constrained along a longitudinal axis between an extended position for filling said dosage chamber and a retracted position for dispensing said treatment substances, and wherein the sliding movement of said stem takes place through contact and pressure of the end of said stem onto the surface to be treated; and wherein said valve also comprises a longitudinal hole defining a sliding wall suited to slidingly house said stem, said second closing means comprising at least one transverse channel created in said stem and having a longitudinal position suited to allow it to be selectively obstructed by said sliding wall when said stem is in said extended position, wherein said first closing means comprise an external wall of said stem suited to come into selective contact with a corresponding elastic wall of said dosage chamber when said stem is in said retracted position to obstruct said filling path, said passage means define a chamber having a constant and predetermined volume and wherein said dosage chamber has a longitudinal end portion in proximity to said dispensing element, said transverse channel being positioned on said stem in such a way as to be at the level of said longitudinal end portion of said dosage chamber when said stem is in said retracted position, allowing for use with said dispensing element directed downwards, ensuring complete emptying of the dosage chamber and wherein said reservoir contains said formulation in spray solution for the treatment of rhagades and small injuries, suited to be transformed into a protective film against germs and bacteria, and suited to favour cicatrization and prevent rhagades-injuries from reappearing. - a dosage chamber having a predetermined volume suited to contain one portion of the treatment substances, - substance passage means suited to alternatively place said dosage chamber in fluid communication with said reservoir in order to fill it or with said dispensing element in order to dispense the treatment substances. - a filling path suited to fill said dosage chamber and first closing means suited to selectively obstruct said filling path while the treatment substances are being dispensed; - an outlet path suited to empty said dosage chamber while the substances are being dispensed and second closing means suited to selectively obstruct said outlet path while said dosage chamber is being filled; - a stem slidingly constrained along a longitudinal axis between an extended position for filling said dosage chamber and a retracted position for dispensing said treatment substances, and wherein the sliding movement of said stem takes place through contact and pressure of the end of said stem onto the surface to be treated;