As useful as this therapy is, there are patients that shouldn’t be exposed to shortwave diathermy. In addition to others, some of these people include pregnant women, those with serious heart and kidney problems, as well as those with sensitive skin and skin allergies. If the patient has a cardiac pace maker, shortwave diathermy isn’t going to be safe or effective. Unexplained neurological issues, like seizures, are another indication that shortwave diathermy is not the answer for the patient. Another health problem that would indicate the need for another type of therapy is malignant cancer. As with any therapy, it’s vitally important to have a thorough medical history on file just to be sure shortwave diathermy is safe for the patient.