Lack of strength in the fingers can be due to physiologic and pathologic causes. Common pathologic causes include trauma, tendon injury, and neuropathy. 1. Physiological causes: for example, prolonged overwork of the hand, lifting heavy objects, etc., will cause muscle fatigue, which will lead to finger weakness and swelling; if the hand muscles are not active for a long time, resulting in tendon wasting atrophy, which will also lead to finger weakness. 2. Trauma: for example, contusion, cuts, abrasions, etc., can lead to finger blood supply and innervated nerves are damaged, affecting the normal function of the fingers, resulting in finger weakness, pain, numbness, and restricted movement. 3. Tendon injury: If the tendons of the forearm are damaged and become congested and swollen, the muscle strength of the fingers will be reduced and symptoms such as pain, spasm and weakness will occur. 4. Neuropathy: For example, nerve root cervical spondylosis usually causes spasms in the muscles and ligamentous tissues of the fingers, resulting in symptoms of numbness and weakness. This is mostly due to the weakening of nerve conduction caused by compression of the nerve roots in the neck. In addition, stroke can also lead to finger weakness and symptoms such as headache, dizziness and light-headedness. All in all, the fingers have no strength, it is recommended to go to the regular hospital in time, according to the specific cause of the disease to follow the doctor’s instructions for treatment.