What is a common sensation experienced at currents below 5 mA?

At currents below 5 mA, the sensation most commonly experienced is tingling. This sensation is often referred to as a mild electrical shock, which can be perceived as a slight prickling or vibrating feeling on the skin. The reason tingling occurs at lower current levels is that the sensory nerve endings become excited without causing significant discomfort or harm.

At this level of current, the body's nervous system is able to detect the electrical flow, leading to sensations that can be interpreted as tingling or mild stimulation. As the current increases beyond this threshold, different sensations and effects can occur due to the increasing intensity of the electrical stimulation, leading to more intense sensations such as muscle contractions or pain. Tutturing of the nervous system activates protective mechanisms at higher levels, but at currents less than 5 mA, the experience is predominantly limited to tingling.