Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain pain in ear after hitting the head hard can be due to traumatic injury to the inside of ear and there is also a possibility that there is a perforation in the eardrum secondary to sudden blow..
I would suggest you to consult an Otolaryngologist and get evaluated and a thorough clinical evaluation and also investigations like Otoscopy and MRI scan can help in diagnosis and treatment can be planned accordingly..
In case if there is a small perforation you can be advised to take a course of antibiotics like
Amoxicillin, anti inflammatory painkiller like
Ibuprofen, take oral and nasal decongestants..
But in case of a large perforation surgical repair known as
Tympanoplasty can be required..
Along with it you should also keep a watch and if at all you experience symptoms like
dizziness, vertigo, vomiting, breathlessness you should immediately consult an Emergency room as it could be a sign of head/
brain injury..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.