The main arteries of the forearm are the radial artery, ulnar artery and common interosseous artery, as well as the superficial palmar arch and the deep palmar arch which are subdivided into the hand. The main manifestations of forearm artery injury are partial obstruction of blood supply to the hand, including weakening and loss of ulnar or radial artery pulsation, coldness in the fingers, skin irritation and numbness. Weakness or loss of arterial pulsation: the artery is located deeper, adjacent to the femoral surface and the posterior part of the knee capsule. It runs obliquely along the outer edge of the semitendinosus muscle to the level of the femoral condylar fossa in the middle of the back of the knee, and then vertically down to the lower edge of the muscle, and is divided into the anterior tibial artery and the posterior tibial artery. The former enters the anterior calf via the superior border of the interosseous membrane, and the latter enters the posterior calf via the deep surface of the tendon arch of the flounder muscle. In addition to the muscular branches of this artery, which are distributed to the neighboring muscles, there are five articular branches, i.e., the medial and lateral suprapatellar arteries, the middle patellar artery, and the medial and lateral infrapatellar arteries, which are involved in forming the arterial network of the knee joint. Weakness and loss of pulsation of the ulnar or radial arteries can be caused by sharp objects and fractures.