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There are plenty of causes for Hearing loss
You may have either conductive or Sensorineural hearing loss.
In conductive type, problem could be either in external ear or middle ear.
In Sensorineural type, problem could be either in inner ear or nerve from inner ear to brain.
If the hearing loss is associated with dizziness
or vomiting, probably the cause could be in inner ear.
Even wax or foreign body in external ear can cause partial hearing loss.
some other causes are middle ear infection
or inner ear disease
exposure to excessive noise also cause hearing loss.
It is better to have physical examination by ENT specialist
If the cause is due to wax or foreign body, you may get immediate relief.
If he suspect an infection, he may give antibiotics appropriately.
sometimes you may advised to take audiogram, X Ray and CT.
Hope this helps.
If doubt kindly reply.