Electrical stimulators are devices that use electrical impulses to stimulate nerves and muscles. They are commonly used in medical settings for pain relief, rehabilitation, and muscle strengthening. These devices can help improve circulation and reduce muscle spasms, making them valuable tools in physical therapy. There are various types of electrical stimulators, including transcutaneous electrical nerve stimulation (TENS) units and neuromuscular electrical stimulation (NMES) devices. TENS units are often used for pain management, while NMES devices are designed to help with muscle recovery and function. Both types can be adjusted for intensity and duration to suit individual needs.