Crutches are mobility aids designed to assist individuals who have difficulty walking due to injury or disability. They provide support by transferring weight from the legs to the upper body, allowing users to move around more easily. Crutches are typically made of lightweight materials like aluminum and come in various styles, including underarm and forearm types. Using crutches requires proper technique to ensure safety and effectiveness. Users must learn to balance their weight and coordinate their movements to avoid falls. Crutches can be adjusted for height to fit the user's needs, making them a versatile option for rehabilitation and recovery from conditions like fractures or surgeries.