Conjunctivitis, also known as pink eye, can be caused by a viral or bacterial infection. It is common for symptoms to include yellow discharge, especially in the morning. If your child has recently had a cold or runny nose, this could be the cause of the conjunctivitis. Conjunctivitis typically resolves on its own within 5-7 days. You can gently clean the eyes with a clean, damp cloth, but be sure not to share it to prevent spreading the infection. If the symptoms persist for more than a week, worsen, or new symptoms develop, it is advisable to consult a doctor. Artificial tears may help improve comfort, but if there are no complaints from your child, additional measures may not be necessary.