Cerium oxide will mainly cause damage to the lungs, skin and mucous membranes. 1. Lung damage: inhaling too much cerium oxide powder for a long time, the lungs may be damaged, and eventually form silicosis, it is recommended that people who work with dust must wear a good dust mask. 2. Skin and mucous membrane damage: for people who usually do not wear gloves to work, it is likely to contain cerium oxide dust particles in contact with the hands or other parts of the skin may feel itchy or rash. If inadvertently enter the eyes, may also cause damage, need to be immediately flushed with water. So contact with cerium oxide must be well protected, feel unwell must go to the hospital as soon as possible for medical treatment.