Arterial insufficiency refers to all conditions with narrowed or blocked parts of arteries. This may occur due to a hardening of the arteries or blood clots. The arteries supply blood to other parts of the body, and with arterial insufficiency, the flow of blood through the arteries is slowed or stopped. Lower limbs are more often affected, and the most common symptoms are pain in the affected limb, pain in calves, especially after a few tens of meters of walk. This can lead to ulcers, non-healing wounds and/or gangrene. HBOT can help arterial blood flow at the cellular level. Hyperbaric oxygen therapy forces oxygen into the body’s tissues and fluids enabling the body to work more efficiently in healing itself.