The left hand can hold the cell phone right hand can not hold may be due to the right hand muscle weakness, right hand tenosynovitis, right hand fracture and other factors. 1. Right hand muscle weakness: left-sided cerebrovascular disease can lead to sensory and motor function disorders on the right side, resulting in muscle weakness of the right hand, which may be accompanied by neurological symptoms such as numbness of the right hand. 2. Tenosynovitis of the right hand: Repeated laborious movement of the right finger for a long time will lead to repeated friction between the tendon sheath and the tendon, which will cause inflammation of the tendon sheath tissue such as congestion and edema, hyperplasia, and so on, resulting in the right hand pain, activity restriction and other symptoms. The right hand will not be able to hold the cell phone but the left hand can. 3. Fracture of the right hand: the right hand suffers from external impact or sudden fall, which will lead to the fracture of the right hand, causing the right hand to be swollen, painful, functionally limited and other symptoms, so that the right hand can’t hold the cell phone. In short, there are many reasons why the left hand can hold the cell phone and the right hand can not hold the cell phone, in order to clarify the cause of the disease as soon as possible, we should go to the orthopedic department of the hospital in time.