Tears in the eyes from a cold may be caused by conjunctivitis, keratitis, or dacryocystitis, and can be treated with general therapy, medication, etc. depending on the cause. 1. Conjunctivitis: When the conjunctival tissues are stimulated by inflammation, the eyes may water frequently, which is easy to develop after a cold. If it belongs to bacterial infection, you can use levofloxacin eye drops, tobramycin eye drops and so on, while for viral conjunctivitis you can use ganciclovir, acyclovir eye drops. 2. Keratitis: Keratitis caused by colds can lead to eye pain, photophobia and tearing. If it belongs to bacterial keratitis, cefazolin can be taken orally, and tobramycin eye drops can be used externally; while for fungal keratitis, fluconazole and ketoconazole can be taken orally, and then flucytosine eye drops can be used externally. 3. Dacryocystitis: It is necessary to remove the infectious factors of the lacrimal sac as soon as possible, and drain the channel as soon as possible. Mainly include tear duct irrigation, tear duct intubation, etc.. If it is a cold caused by tearing eyes, also need to anti-flu treatment, specific should follow the doctor’s instructions, avoid unauthorized use of drugs.