The phenomenon of tears while sleeping may be related to visual fatigue, dry eye syndrome or allergic conjunctivitis. First of all, the cause should be clarified, if the sleep tears, accompanied by dry and sore eyes, considered to be caused by dry eyes, with artificial tears type eye drops treatment, more Bevosol, vitreous acid sodium eye solution. If the eyes are tearing and the eye discharge is also increased, it is considered to be caused by bacterial infection, and it is recommended to treat with antibiotic eye drops, and levofloxacin hydrochloride is used clinically under non-allergic conditions. If the eyes are tearing in sleep, while stinging eyes red and itchy, may be related to allergic conjunctivitis, you can apply local cold compresses or use anti-allergy drugs.