If the doctors were IT-specialists:

I don’t have a keyboard.

Take samples for subclavial sugar and lactose, take a X-ray and functional key test.
[After 2 months and 20 thousand rubles]... Indeed, a caramel plaque was found under the gap.

What to do?

- You are shown a conservative therapy: tap the reverse keyboard for 15 minutes every day, then wipe the key with alcohol for 15 minutes, then develop the key manually. Before the end of the life of your system unit, try to use the gap as rarely and carefully as possible. Put a virtual keyboard and print with the mouse.