Can I sleep with my hearing aids on?
To answer this question in the simplest form, no, you should not sleep with your hearing aids.
A hearing aid that fits behind the ear has microphones that are positioned in the hearing aid housing behind the ear. When you sleep wearing the hearing aid, while it is switched on, every-time the microphones get covered with a pillow or mattress there is the potential to create feedback or whistling from the hearing aids. This is not so great for sleep quality for you, or for the person you might share a bed with.
Another issue is comfort. Custom hearing aids and ear pieces are made out of a range of material; hard acrylic, silicon or even titanium so when you lay on your ear for more than a short amount of time this will not be very comfortable and the material may press into the skin of the ear causing pressure points.
We also see that on average hearing aids are worn for over eight hours per day and these materials are not breathable so removing them at night when you go to sleep allows the skin to breathe and rest and for ear wax to gradually migrate out of the ear.