Hi...Thank you for consulting in Health Care magic. I understand your concern.
The
vomiting could be because of hitting of the head. I don't think this is because of
allergy.
I will suggest you danger signs of
head injury -
1. Vomiting continuously - not single like this.
2. Seizures
3. Watery of bloody discharge from ears and nose
4. Unconsciousness
5. Altered sensorium or behaviour.
If none of them are present, I don't think you should worry about his trivial head injury. For pain you can give oral
Paracetamol in the dose of 15mg/kg/dose(max ceiling dose 500mg) every 4-6th hourly.
Hope my answer was helpful for you. I am happy to help any time. Further clarifications and consultations on Health care magic are welcome. If you do not have any clarifications, you can close the discussion and rate the answer. Wish your kid good health.
Regards - Dr. Sumanth MBBS., DCH., DNB (Paed).,