Air bladder effect
An air bladder effect, or simply a bladder effect, is a visual special effect to achieve the appearance of bubbling or peeling skin in motion pictures, particularly horror movies. The effect involves plastic or latex balloons—known as "bladders"—which are concealed beneath the surface of foam latex or similar prosthetics. Attached to the bladders is a system of tubing that allows them to be inflated. When the bladders are inflated underneath the prosthetics (often skin prosthetics), it results in the prosthetics appearing to shift, bubble, swell, or pulsate.