Hi and thanks for the query,
It is important to be very sure that the bump has not been there before. If it is actually the case, it might be possible that she had a head injury
sometime back which was never reported. A clinical examination shall be very appropriate to actually elucidate other signs pointing towards trauma.
That being the case, it shall be worthwhile to watch out for signs of intracranial hypertension
. Intense generalized headaches
more frequent in the early hours of the morning, nausea and jet like vomiting
, blurred vision
, weakness of any part of the body, fits or language difficulties should give a very strong alert. Watching for other general signs like fever and a general physical examination excluded an infectious origin of the headache.
However, I suggest a detailed history and physical examination by your emergency room physician, an a CT scan scan, depending on the case might be appropriate to be on the safe side.
Thanks and hope this helps,