Hello
I understand your concern
Fever,headache,
abdominal pain,vomiting can be due to enteric fever/viral hepatitis/
leptospirosis.
If I were your treating doctor,I would recommend,
-You need to visit paediatrician/physician for physical examination and blood work out.
Investigations like blood haemogram,widal test for typhoid,liver function tests are necessary.
Accordingly,antibiotics course will be started for 7 to 10 days.
-
Antipyretic analgesic combination like
paracetamol plus ibuprofen /aclofenac 3-4 times a day for headache and fever.
-Antiemetic like
domperidone twice for vomiting.
-Adequate intake of water.Oral rehydration solution preferred.
-Soft semi solid light home made fresh food should be given like thick soups,porridge.Small frequent meals will help in better digestion.
Hope this information helps.
Wish your son speedy recovery.