My sister has been diagnosed with a mild hearing loss. She is very disturbed about it. Her marriage is fixed for the coming month. She is unable to hear while talking with her fiance. I badly want to help her out. She has to get hearings aids pretty soon. Are there any side effects? Will she have to replace them every year or something? She wants to get the one which has Bluetooth connectivity. Can someone share your knowledge on the Bluetooth hearing aids? It would be a great help for my sister.