The ear is full of earwax, which may be caused by excessive dust, excessive cerumen secretion, and obstruction of ear canal drainage. The medical term for earwax is cerumen, which is a yellowish secretion secreted within the skin located in the cartilaginous part of the external auditory canal, and has the function of protecting the skin of the external auditory canal and adhering to foreign objects. Most of the cerumen can be dislodged outwardly with the change or movement of the head position and the movement of the jaw joint. The reasons for the increase are as follows: 1. Excessive dust: If the environment where you are located is dusty and dusty, the dust enters the external ear canal and combines with the oil, which will also produce more earwax. 2. Excessive cerumen secretion: mostly related to heredity, some people have oily cerumen, which is not easy to be discharged by themselves. 3. Discharge obstacles of the ear canal: narrowing of the external auditory canal, deformity, scar, etc., muscle relaxation in the elderly, jaw joint movement weakness, the external auditory canal opening collapses, affecting the discharge of cerumen, resulting in a lot of earwax. If you have a lot of earwax, you should go to the hospital in time to avoid delaying your condition or causing adverse reactions.