Hi, thanks for using healthcare magic
Based on the symptoms that you have described it is likely that he has either the cold or flu virus. The flu virus tends to present with more severe pain
in the muscles and joints as well as more intense fatigue and general malaise.
These viruses can affect any aspect of the respiratory tract
and commonly the ears as well. The ringing in his ears may mean that he has an ear infection
, these can sometimes resolve on their own.In other cases anti biotics for the ear infection may be needed.
He can consider symptomatic treatment which would include using (1) cold or cool liquids ,tepid sponge with tepid water, light clothing (2)paracetamol
to help with the joint and muscle pain
and fever (3) a cough syrup with a mixture of cough suppressant and decongestant to help with the cough and nasal symptoms
He needs to get as much rest as he can.
He can likely wait till morning. If he feels considerably worse during the evening then he can go to the ER.
I hope this helps