10 Terrible Diseases You Could Have Without Even Knowing

2. Diabetes

Man checking his blood sugar levels

You can have diabetes and not even know. | iStock.com

It’s possible to be born with type 1 diabetes, but developing type 2 is also common as you age. The American Diabetes Association explains the condition causes blood glucose levels to rise abnormally high because your body fails to properly use the hormone insulin, which helps to regulate your blood sugar. Those who have diabetes often report feeling very thirsty, feeling an increase in appetite, and feeling tired. Unfortunately, many people can come up with any number of excuses for feeling hungry, thirsty, or tired, so this makes the disease difficult to detect early on. And for women who develop gestational diabetes, there are often no symptoms at all.

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