You need to visit an ENT physician for complete examination of the ear as trauma can result in perforation of the tympanic membrane, discontinuation of the little bones in the ear, trauma to the canal and so on. You may also need a pure tone audiometry.
Next Steps
Keep ear dry. No oil/water/ Ear drops to be instilled in the ear as they can carry the infection from the canal to the inner or middle ear.
Health Tips
Traumatic perforations have a high rate of healing if care is taken and there is no infection. KEEP EAR DRY!