Yellow crusted material inside the ear may be cerumen, otitis externa, and eczema of the external ear canal. 1. Cerumen: yellow crusts inside the ear may be cerumen, which is the natural metabolism of the ear skin desquamation process, without special treatment, do a good job of local cleanliness and hygiene work can be. 2. Otitis externa: acute attack of otitis externa can cause the phenomenon of yellow crust inside the ear, and may also be accompanied by local pain. 3. Eczema of the external auditory canal: Eczema of the external auditory canal can cause oozing, erosion and other phenomena during the acute attack, which can lead to the phenomenon of yellow scabs in the ear. There are many reasons why there are yellow crusts in the ear, and after the symptoms appear, it is recommended to go to the hospital in time to improve the examination, and take standardized treatment under the guidance of the doctor, and do not treat it privately, so as not to lead to adverse consequences.