The curvature of the little finger may be caused by fracture, tenosynovitis, tendon contracture, congenital finger deformity, etc. It can be corrected by manipulation, fixation and surgery. 1. Fracture: trauma can cause fracture of the last joint of the little finger, fracture deformity can lead to the phenomenon of curved little finger, you can carry out manipulation of repositioning, fixation of the support to correct the deformity, after the fracture healing of the little finger curvature phenomenon can be gradually restored. 2. Tenosynovitis: due to the tendon in the tendon sheath, there is a tendon pressure and edema, there will be the phenomenon of bending the little finger can not be straightened, can be taken to hot compresses, massage and other methods to relieve muscle spasm and pain symptoms, but also can be used to fix the external brace, the symptoms of the serious should be taken to surgical treatment methods, treatment of primary diseases. 3. Tendon contracture: due to trauma and other factors lead to tendon rupture, affecting the function of finger flexion and extension, which can cause the phenomenon of little finger bending and extension, should choose surgical treatment for tendon suture, to improve the little finger deformity. 4. Congenital finger deformity: if the bent little thumb is a congenital cause, generally need to be treated with surgical osteotomy orthopedics. There are many other causes of little finger curvature, and it is recommended that the patient should consult the doctor in time, and carry out standardized treatment after clear diagnosis.