A cat with runny nose, tears, and sneezing may be caused by a cold, feline calicivirus, feline herpes virus, psittacosis, mycoplasma, chlamydia, etc. If the season changes, it may be a cold, and you can give the cat pet cold medicine. ; If the cat shows signs of poor energy, loss of appetite, increased eye and nose secretions, etc., it is likely to be a viral infection. It is best to send it to a pet hospital for examination to confirm the cause and then carry out targeted treatment to avoid delaying the condition.