1. Congenital hearing loss
implies that hearing loss is present at birth. It can include hereditary hearing loss or hearing loss due to other factors present either prenatally or at the time of birth.
Hearing loss present at birth, can be caused by genetic or non-genetic factors.
Risk factors result in congenital hearing loss:
- Family history
- Maternal infections such as rubella (German measles)
- Anoxia (lack of oxygen)
- High level of bilirubin in blood
- Abnormal development of the ear, nose and throat
2. Acquired hearing loss
is a hearing loss which appears after birth, at any time in one’s life. It may be a result of a disease, a condition, or an injury.
Hearing loss present after birth, can be caused by a disease, condition or injury.
Risk factors result in acquired hearing loss:
- Ear wax blockage
- Perforated ear drum
- Middle ear infection
- Otosclerosis or ossicular discontinuity
- Sequelae from neonatal diseases such as measles and meningitis
- Head injury
- Noise exposure