Obstructive lung disease is a category of respiratory disease characterized by airway obstruction. Complications may include enterocolitis, megacolon, bowel obstruction and intestinal perforation. Costovertebral angle tenderness suggests upper urinary tract obstruction. Venous problems like venous outflow obstruction and low-flow states can cause acute arterial ischemia. Tumors causing bowel obstruction produce higher CEA levels. The definitive treatment for cholangitis is relief of the underlying biliary obstruction. Several treatments can be provided via bronchoscopy for the management of airway obstruction or bleeding. These cause permanent obstruction of aqueous outflow. It results in uterovaginal outflow tract obstruction. It has been used in the treatment of malignant bowel obstruction. Removal is important in preventing nasal obstruction and recurrent epistaxis. It is not recommended in people with a bowel obstruction or pneumothorax. Horses usually present with colic signs referable to small intestinal obstruction. Pregnancy rhinitis may lead to nasal obstruction and mouth breathing. It should not be used in people with a bowel obstruction or glaucoma.