Cats with yellow pus and eye droppings can be treated with erythromycin eye ointment or special eye drops for pets. This condition is usually caused by internal heat, viral infection, or feline plague. The cat should drink more water at ordinary times. Help the cat clean up eye secretions every day, and be careful not to feed the cat food that is too oily or salty to avoid causing discomfort to the cat. If the cat’s condition does not improve, it needs to be sent to a pet hospital for examination and treatment.