device for administering an injection is generally discussed herein with particular discussions extended to devices for stimulating a cavity below the skin and administering a dosage in the stimulated cavity and method of using the same . the dosage can be medication for health and / or cosmetic treatments . the device includes a housing and a needle mounted thereto . a vacuum source is in communication with the housing for creating a vacuum inside the housing while a power source is in communication with the needle for supplying current to the needle . the combination current and vacuum stimulates a cavity for injection . a vacuum source may also be used to advance a piston to discharge medicament from a needle mounted on a syringe .