What causes vomiting and concussion?
Patient: My 5 year old son has now hit his head for the second time in 8 months. The first time resulted in sleepiness, vomiting and a concussion. We now have some of the same symptoms. Already having trouble staying awake within 15min of hitting head. Should we return to er? Doctor: Hello,  Most likely there is no serious cause. If symptoms remain mild and there is no clinical deterioration over the next few hours, there is no need to go to the ER. On the other hand, if there is severe headache, or repeated vomiting, it would be better to go to the ER.   Hope I have answered your query. Let me know if I can assist you further.  Take care  Regards, Dr Sudhir Kumar, Neurologist