 Deafness and hearing loss are widespread and found in every region and country. An estimated 466 million people worldwide, 5.5% of the population, have disabling hearing loss, and this number is expected to rise to 1 in 4 by 2050. Our ability to hear is precious. Untreated hearing loss can have a devastating impact on people's ability to communicate, to study, and to earn a living. It can also impact on people's mental health and their ability to sustain relationships. The main reasons for hearing loss are rubella in mother, loud noise, use of earwax, ear trauma, ear harming drugs, ear infections. Hearing loss in children, 34 million children all over the world, have deafness or hearing loss, of which 60% of cases are due to preventable causes. The signs of hearing loss are different for each child. Some of the common signs are, they turn the television volume too high, do not respond to sound, has discharge from ear, speech is not clear, and speech is delayed. Hearing loss is a common problem for older adults. Approximately 1 in 3 people between the ages of 65 and 74, has hearing loss. The three main causes of hearing loss in elder people are, changes in blood flow to the ear, impairment to the nerve that carries sound to the brain, structural change in the inner ear. Some people have a hearing problem but don't realize it, you should see your doctor if you have hearing problem like. Have trouble hearing over the telephone, rise volume of television frequently. People find you speak too loudly. Often, ask people to repeat what they are saying. If you notice signs of hearing loss, talk to your doctor. If you have trouble hearing you should, let people know you have a hearing problem. Ask the person speaking to reword a sentence and try again. Ask people to face you, and to speak more slowly and clearly. Let the person talking know, if you do not understand what he or she said. Pay attention to what is being said, and to facial expressions or gestures.