Elevating the head of the bed refers to the practice of raising the upper portion of a patient's bed, typically between 30 to 45 degrees. This position is beneficial for various medical conditions, particularly those related to the gastrointestinal system, such as peptic ulcer disease and gastroesophageal reflux disease (GERD). By allowing gravity to assist with digestion and reducing pressure on the stomach, this technique can help alleviate symptoms and improve overall comfort.