Crutches are mobility aids used by individuals with temporary or permanent mobility impairments, such as leg injuries, surgeries, or conditions affecting the lower limbs. They typically consist of two upright poles, known as the shafts, with handles at the top for gripping, and a padded underarm support or cuff. Crutches come in various designs, including axillary (underarm) crutches, forearm crutches (also known as elbow or Lofstrand crutches), and platform crutches.