Weakness of the hands and inability to make strength may be caused by fatigue, cervical spondylosis, nerve injury of the upper limb, cerebral hemorrhage, etc. According to the cause of the disease, you can choose to treat it through rest, physical therapy, medication, surgery, and so on. 1. Fatigue: When experiencing more strenuous physical exercise, lactic acid accumulates in the muscles of the upper arm, and the symptom of hand weakness will appear. At this time, you should rest in time, can be combined with physical therapy, hot packs to help relieve the weakness of the hand to make the situation. 2. Cervical spondylosis: when there is a cervical disc herniation, the long-term compression of the cervical disc nerve root may also lead to weakness of the hand to make the strength, the symptoms are mild, you can take anti-inflammatory and pain relief, nutritive nerve medication, if the degree of compression is more serious, but also through the surgical removal of the protruding cervical disc for treatment. 3. Upper extremity nerve injury: If the upper extremity injury causes ulnar nerve or other upper extremity nerve injury, it may cause hand weakness. The diagnosis is usually clear through electromyography, and the symptoms of hand weakness can be relieved through surgical nerve release. 4. Cerebral hemorrhage: When cerebral hemorrhage occurs, the weakness of the hands will suddenly appear, and in most cases, it is accompanied by weakness of the lower limbs on the same side, dizziness, headache and other discomforts. In most cases, it is accompanied by weakness of the lower limbs on the same side, dizziness, headache and other discomforts. It is necessary to check and treat in the hospital in time, and in serious cases, it is even necessary to open the cranium to remove hematoma. If rest or massage does not relieve the symptoms, it is recommended to go to the hospital to do a comprehensive examination to determine the cause of the disease and take timely treatment.