Abstract: A therapy device for specifically local short-term treatment of infectious illnesses transmitted by droplet infection, such as colds, by a heated dry current of air which is warmed up and acts directly and in a locally restricted manner onto the epithelium of the nasal cavities and the adjacent areas in the nasal/throat region. The therapy device profits of the knowledge that it is easier to combat symptoms caused by colds, when the dry heated air current which is used has a relatively high temperature in the range of noticeably above 50° C.