Hi, thanks for your query.
In my opinion you son might probably have upper resp tract infections, probably viral infection.
Red spots may be the skin rashes which is common in viral infection. Use a
calamine lotion twice daily for a week.
For
fever, if fever is more than 100 then give him,
paracetamol suspension.otherwise just monitor him.
For running nose and
cough , I would suggest a antihistamine+ decongestant syrup for 5 days.
If symptoms persists, then the child may need a course of antibiotics.
All these are prescription medicines , so I advise you to
consult doctor and discuss the treatment.