How many different types of ulcers?

Many types: Types of ulcers can include: neuropathic, gastric, peptic, duodenal, esophageal, venous, sickle cell, diabetic, pressure ulcers.

4 types: Arterial ulcers due to poor circulation. Venous ulcers due to venous stasis or venous insufficiency, diabetic ulcers, pressure ulcers and surgical or traumatic ulcers. More than four. All have different treatment.