Bulldog,  also known as the British Bulldog or English Bulldog, is a medium-sized dog breed. It is a muscular, hefty dog with a wrinkled face and a distinctive pushed-in nose. The folds, or 'rope', on a Bulldog's face should be cleaned daily to avoid infections caused by moisture accumulation. Some Bulldogs' naturally curling tails can be so tight to the body as to require regular cleaning and ointment. Some Bulldogs' naturally curling tails can be so tight to the body as to require regular cleaning and ointment. Due to the high volume of skin folds on the Bulldog's body, they have high prevalence of skin-fold dermatitis. Like all dogs, Bulldogs require daily exercise. If not properly exercised it is possible for a Bulldog to become overweight, which could lead to heart and lung problems, as well as stress on the joints.