White grains of rice in the ear may be caused by cerumen or suffering from boils or otitis externa. 1. Cerumen: Cerumen is usually formed by the secretion of ceruminous glands on the skin of the external auditory canal, which is mostly dry and can be manifested as white grains of rice, which is a normal phenomenon. 2. External auditory canal boils: Habitual pulling out the ear or local skin injury can lead to bacterial infection and external auditory canal boils, which may appear as white rice grains after pus plugs are formed. If the swelling is obvious, there will be localized redness and abscess. 3. Rash in the external auditory canal: Inflammation of the external auditory canal due to bacterial or fungal infections can be manifested as pimple-like white rice grains. If there are white rice grains in the ear with uncomfortable symptoms, you should consult a doctor for examination and diagnosis.