Zinc oxide is white, amorphous fine powder, odorless, gradually absorbs carbon dioxide in the air, insoluble in water, ethanol, soluble in alkene acid and strong alkali solution, has a weak astringent and antibacterial effect, moisturizing, protective and drying effect. It is commonly used as oil and ointment, or in combination with other drugs to form compound preparations. Oil and ointment are often used for small, mild burns, subacute dermatitis, eczema, prickly heat, ulcers and skin protection around intestinal fistula. Compounded zinc oxide ointment is used for mild burns, impetigo, and boils. Its use is usually topical, twice a day, with occasional skin irritation and burning sensation or allergic reactions such as rash and itching. It should not be used for acute eczema, dermatitis and hairy areas with more ooze. Avoid contact with eyes and other mucous membranes. If there is burning sensation, redness and swelling at the site of application, the drug should be stopped immediately.