Four Types of Actuators. An actuator is a kind of motor that controls or moves mechanisms or systems. It takes hydraulic fluid, electric current or other sources of power and converts the energy to facilitate the motion.
Dercumâs disease, also known as adiposis dolorosa, is a rare disorder characterized by multiple, painful growths consisting of fatty tissue, called lipomas. They mainly occur on the trunk, the upper arms and upper legs and are found just below the skin.
In babies, dermatitis is usually caused by allergies from diapers. Red rashes around the neck may also develops from rosacea. While in dermatitis, you might develop severe rashes only in a certain area, in rosacea, these rashes spread from the face onto the skin around the neck and ears. Rashes in dermatitis is commonly itchy and painful, while in rosacea, it is not. Instead, the rashes is usually stingy and causes burning sensation.