Wax in the ears that causes symptoms can often be removed by gentle syringing with warm water. Whilst simple to do, it best done after softening the wax with wax softeners.
There can be some potential complications which are very uncommon. These include:
Perforation of the ear drum. If this fails to heal, it may require the need for surgical repair
Bruising and bleeding of the ear canal
Ulceration of the canal
Infection of the ear canal (otitis externa) or middle ear (otitis media)
Earache
Hearing loss
Ringing in the ears
Dizziness and nausea