Question

What Is The Difference Between Sick And Exhausted?

Answer 1

The difference between being sick and feeling exhausted is that when you're sick, there's a virus involved which causes a disease and makes you ill.

Feeling exhausted on the other hand is slightly different. You feel physically or mentally drained due to overworking, stress and exercising. 

Answer 2

When you're sick, you're ill, or not feeling well.

When you're exhausted, you're tired, or worn out.