A blood sugar chart is a paper or electronic tracking record used to monitor blood glucose levels. Information charted should include date, blood glucose levels before and after each meal, target reading, medications taken, and any other factors that may affect blood sugar levels, states Healthline.
The purpose of measuring glucose is to help prevent too much or too little sugar in the blood. Consistency is necessary, and it is important to note other factors that can affect blood glucose levels, such as weather, activity levels and illness. Keeping track of blood sugar levels makes it possible to determine if medication is required or if a change needs to be made in the treatment plan, according to Healthline.