Can anyone give information on the cure of the infection called mumps. on a child side cheek.

I would appreciate an urgent answer.

It's treated with antibiotics. Medical treatment is your best bet

Get him to the hospital fast cos the major complications of mumps is sterility.

Is there actually a cure? It's a viral infection and it will run its course with just pain relief meds to manage pains

Mumps is a viral illness which will go on its own.

However, the picture you placed up is not the child is it?

Get the person checked at the hospital, as it might be something more sinister than mumps, especially since it's one sided like the picture you posted.