Visit ENT specialist and go for annual hearing loss screening.

Reduce usage of earphones/headphones and limit use to under 90 minutes

Reduce volume when using earphones/headphones

Use earplugs when in a noisy area.

Don't ignore your diabetes, have yourself treated for it.

Clean your ears regularly.

Take a course of Vitamin B12 and folic acid as a deficiency in these vitamins can lead to hearing loss.

Wear a hearing aid. If you do not have the necessary sensory information coming to your ears, you can suffer from tinnitus leading to brain atrophy.