what are the different types of skin ulcers?
['Decubitus (pressure) ulcers. Decubitus ulcers are caused by continuous pressure or friction on the skin. ... ', 'Venous skin ulcers. Venous skin ulcers are caused by poor blood circulation in the leg veins. ... ', 'Arterial skin ulcers. ... ', 'Neuropathic skin ulcers.']