Ulceration may refer to:

– Ulcer (dermatology), a discontinuity of the skin
– Oral ulcer, an open sore inside the mouth
– Aphthous ulcer, a specific type of oral ulcer also known as a canker sore
– Peptic ulcer, a discontinuity of the gastrointestinal mucosa (stomach ulcer)
– Corneal ulcer, an inflammatory or infective condition of the cornea
– Venous ulcer, a wound thought to occur due to improper functioning of valves in the veins
– Genital ulcer, an ulcer located on the genital area