Duiyunzhuang can be used at night, the use of drugs need to pay attention to its indications, contraindications, precautions, etc., specific can follow the doctor’s instructions. DuoYunZhuang is made of glycerite (calcined), ice tablets, frankincense (system), alum (calcined) musk, gentian extract, myrrh (system), borax (calcined), manganese nitrate, XuanMing powder to make a detoxification and dispersal of nodules, brightening the eyes to reduce cataracts (to improve vision, improve the blurring of vision), swelling and pain (to eliminate the swelling and pain) efficacy of the proprietary Chinese medicines. The medicine is indicated for the treatment of outbreaks of fire eye (i.e. infectious conjunctivitis, also known as red eye), itching and tearing of the eyes, redness and swelling of the eyes, pterygium, gua sha eye stinging pain, swollen and painful gums, and redness and swelling of the throat and tongue. The drug does not specify that it should not be used at night, so those who meet the indications can use the drug at night if necessary. Note that the drug should be contraindicated in people who are allergic to the product, people with conjunctival or corneal injuries, pregnant women. The user may experience eye pain, redness, swelling, itching and other adverse reactions, if necessary, should go to the hospital. During the use of the drug should pay attention to avoid smoking, alcohol, spicy food and avoid fish and shrimp fishy things. Specific medication should be under the guidance of a physician, not unauthorized use of medication.