Can hearing aids make your hearing worse?

Properly prescribed and fitted hearing aids definitely cannot make your hearing worse, because they do not physically alter the state of your hearing mechanism. Also, hearing aids are preset to a safe maximum level. Once your hearing has begun to deteriorate, it will usually continue to do so over time, but hearing aids are designed to help you make the most of your remaining hearing to make sounds clearer and sharper. You may find that louder sounds you haven't heard in quite some time may surprise you, so you will need to acclimatize yourself to this.