Crutches are mobility aids designed to assist individuals who have difficulty walking due to injury, surgery, or disability. They help to redistribute weight from the legs to the upper body, providing support and stability. Crutches come in various types, including underarm crutches, forearm crutches, and platform crutches, each suited for different needs and levels of mobility. They are typically adjustable for height, made from lightweight materials like aluminum or wood, and feature comfortable grips and padding for extended use. Crutches are essential for short-term recovery or long-term mobility assistance.