My son has a bad cough he is 6mths will be 7 mnths in november and he has lots of mucus and gets hot as well kindly advice what I can get him? And what is the cause of this

Viral URTI. This is probably a viral upper respiratory tract infection. Treament is symptomatic, cold&flu remedies and cough syrups generally don’t work and could be dangerous. If the fever persits, or your baby has resporatory distress and is unable to feed, you should consult.