Lying down with a vague pain below the ribs may be caused by costochondritis, intercostal neuritis and trauma. 1. Costochondritis: Costochondritis refers to the chronic non-specific inflammation that occurs in the rib cartilage area, also known as non-suppurative costochondritis, and the patient will have localized pain, obvious pain when pressed, and other symptoms. 2. Intercostal neuritis: intercostal neuritis refers to the inflammatory reaction of the intercostal nerves due to certain reasons, and a kind of disease that causes pain in the intercostal area of the chest or the abdomen in the form of a band, and the patient will have the symptom of hidden pain below the ribs. 3. Trauma: when the patient is violently injured, resulting in rib fractures, which leads to the symptoms of hidden pain under the ribs when the patient is lying down. When the patient appears lying below the ribs hidden pain, should go to the hospital in time to carry out the appropriate examination, clear cause for standardized treatment.