Thermotherapy is a treatment method that uses heat to relieve pain and promote healing in the body. It can involve various techniques, such as hot packs, warm baths, or infrared saunas. This therapy is often used for conditions like muscle strains, arthritis, and joint pain, as heat can help increase blood flow and relax tight muscles. The application of heat in thermotherapy can be either superficial or deep. Superficial heat affects the skin and underlying tissues, while deep heat penetrates further into the body. Physical therapists and healthcare professionals commonly recommend thermotherapy as part of a comprehensive treatment plan for pain management and rehabilitation.