Final answer:
Muscle weakness is an early sign of compartment syndrome.
Step-by-step explanation:
An early sign of compartment syndrome is muscle weakness.
Compartment syndrome is a condition in which there is increased pressure within a muscle compartment, causing compression of nerves and blood vessels. As a result, the affected muscles may become weak and lose their normal function. It is important to seek medical attention if you experience muscle weakness, as compartment syndrome can lead to tissue damage and other complications.