What should you know about forearm fasciotomy technique?

Muscles, nerves, and blood vessels sit inside compartments enclosed partly by firm fascia. After a major injury, fracture, crush injury, bleeding, or severe swelling, pressure can rise inside that space and reduce tissue perfusion. During fasciotomy, a surgeon makes carefully planned incisions through the fascia to decompress the affected compartments. The incision may need to remain open temporarily while swelling settles, with dressings, a later closure, or reconstructive cover depending on the wound.

This procedure is often time-sensitive, so the surgical team will explain the suspected compartment, examination findings, anaesthesia, and possible need for further procedures. Afterward, keep dressings clean and follow instructions about elevation, movement, weight bearing, wound review, and rehabilitation. Report increasing pain, new numbness, colour change, worsening swelling, fever, or drainage promptly. The broader [Fasciotomy](/treatments/trauma-and-fracture-care/fasciotomy/) guide can help you prepare questions for the treating team.

Before surgery, escalating pain that seems out of proportion, pain with gentle finger or wrist movement, a tense swollen forearm, new numbness, weakness, or a pale or cool hand requires immediate emergency assessment. After surgery, follow the hospital's urgent contact instructions for rapidly worsening pain or swelling, loss of sensation or movement, wound bleeding, fever, or a change in hand colour.

Which compartment is affected and what caused the pressure? Will the wound be closed later? What movement, dressing, and wound-care instructions apply? Which signs should make me return immediately? When will hand and forearm rehabilitation begin?