Can I do anything to help him? He drinks a lot, eats less but still eats, and sleeps a lot less because of his cough.

It is important to monitor your child's symptoms closely and provide appropriate care as needed. Keeping your child hydrated, managing their fever with ibuprofen or acetaminophen, addressing nasal congestion, and elevating their mattress can all help alleviate their discomfort and promote a speedier recovery. It's also a good idea to consult with a healthcare professional if the symptoms persist or worsen.