What causes ear defects?
Loud sounds, music, and other loud noices can couse ear defects.
Anything that completely blocks the ear canal can cause hearing loss. Blockage with earwax (also called cerumen) is common. Many other problems can block the ear canal and lead to hearing loss. Such blocking causes a decrease in volume but does not generally produce distortion. These problems include: Infections with swelling that shuts the ear canal Foreign bodies in the ear An injury Birth defects A growth in the ear canal
Heart defects tend to run in families. So, a medical history is important. However, there are many other causes of heart defects - such as smoking, drinking, hot tubing, taking drugs/medicines during pregnancy. There are also many unknown causes of heart defects. More research is needed to discover these unknown causes.