According to your sign and symptom you are suffering from some infection like acute upper respiratory tract infection .
As you know that best treatment depend on the correct diagnosis and correct diagnosis depend on the complete history of the patient so please take consultation from a doctor and give complete history of the patient so that correct diagnosis will be make and then best treatment will be start
Next Steps
You can give
vitamin D3 .
you should also give Multivitamin A to Z 5 ml 2 time per day for 1 week for strength and immunity.
Syp Montec lc for kid 5 ml for running nose and cold.
Syp Augmentin 275 as 5 ml 2 time per day for3 day after food for infection and cough.
Health Tips
Please follow good life style.