Abstract: A hand-wound tourniquet is an apparatus that stops blood flow of an injured appendage as quickly as possible and with minimal effort. The apparatus applies constant pressure against the limb without any manual input. The apparatus includes a housing, a strap, a hook, a reeling shaft, a handle, and a cam-locking mechanism. The reeling shaft traverses into the housing and is rotatably and slidably mounted to the housing. The handle is positioned external to the housing and is torsionally connected to the reeling shaft. The strap traverses into the housing. The cam-locking mechanism is operatively integrated into the torsional connection between the reeling shaft and the handle, wherein the longitudinal motion of the reeling shaft is used to actuate the cam-locking mechanism in order to prevent the rotation of the reeling shaft. The apparatus preferably includes a mount that accommodates the curvature of a limb.