The causes of blood in the ears include excessive ear digging, ear trauma, and benign and malignant growths, as follows: 1. Excessive ear digging: When there is blood in the ears, there may be excessive force in digging the ears, causing the skin of the external ear canal to break down and a small amount of blood to seep out. 2. Ear trauma: Patients may also suffer from trauma to the ear, causing traumatic perforation of the eardrum and a small amount of bleeding in the ear. 3. 3. Benign and malignant growths: Some patients may also develop benign and malignant growths in the external ear canal or middle ear cavity, which may lead to bleeding. Therefore, if a patient experiences recurrent episodes of blood inside the ear, further endoscopic examination of the ear and imaging of the ear are required to determine the specific condition in a comprehensive manner.