Crutches are a type of Walking Aid that serve to increase the size of an individual?s base of support. It transfers weight from the legs to the upper body and is often used by people who cannot use their legs to support their weight (ie short-term injuries to lifelong disabilities). Axillary crutches are used by placing the pad against the ribcage beneath the armpit and holding the grip, which is below and parallels the pad. They are usually used to provide support for patients who have temporary restrictions on ambulation. With underarm crutches, sometimes a towel or some kind of soft cover is needed to prevent or reduce armpit injury. A condition known as crutch paralysis, or crutch palsy can arise from pressure on nerves in the armpit, or axilla. Specifically, ?the brachial plexus in the axilla is often damaged from the pressure of a crutch?In these cases the radial is the nerve most frequently implicated; the ulnar nerve suffers next in frequency.