Diabetes

Especially with kids, and especially in diabetes 1, there might be a need to monitor glucose levels even at night.

There are several products in the market that are worth looking at. 

Good answer from photokim

In general terms once an older child or an adult has achieved stable blood sugar control, whether by diet, tablets or insulin - there is no need to monitor during the night.

The only exception might be if someone was having symptoms at night suggestive of the blood sugar being too low.

If your blood sugar is in good control, there is usually no need to check during the middle of the night. Occasionally, my doctor wants me to check at 3:00 AM if I made changes to my insulin routine, but this an extremely rare situation. One of the newest products available for people using insulin pumps by Minimed (like me) is their Continuous Glucose Monitoring System. This will check a persons blood sugars automatically. I use their pump but not the monitoring system. Their agent in Israel is Agentek 03-649-3111.