Don't trust the so-called universal physiotherapy instrument. Physical therapy refers to the method of treatment or health care through physical factors such as sound and light, electromagnetism, cold and heat. Single electrotherapy is divided into low frequency, intermediate frequency and high frequency, and each is divided into several different frequencies and waveforms. Plus there are dozens of ways to combine each other. Each method has its own indications and contraindications, and should be done according to the course of treatment. There can be no "general treatment". The old man is not feeling well, so he'd better see a doctor.
Moreover, in the cold winter, it will be uncomfortable to contact the cold environment immediately after the treatment that is too hot. The so-called one violence and ten cold, the human body is also prone to illness.