Diathermy is a treatment that helps with pain and inflammation and congestion by heating the body inside out. The heat breaks up congestion by increasing the circulation. It also has a sedative soothing effect on nerve endings. It enhances nutrition and affects dissipation of waste materials and relaxes the muscles. It is excellent on sinus congestion and infection, bronchitis, ear infections and sprains and strains. It is a comfortable and relaxing therapy that is very effective.