After poisoning, the following symptoms will appear on the hand: 1, cyanosis, cyanosis, many poisoning will damage the respiratory system, hypoxia and other manifestations, then there will be cyanosis and cyanosis of the whole body, and the hand will also appear the same symptoms. 2, the hand will be swollen, because a lot of poisoning will lead to vascular and neuropathy, resulting in vasculo-neurogenic oedema, which leads to the swelling of the hand. 3, the hand will be pain, weakness, muscle stiffness, many poisoning also leads to damage to the nervous system affecting the musculo-neurological system, resulting in stiffness, pain, should go to the hospital in time for treatment. Stiffness, many poisonings also lead to nervous system damage affecting the musculoskeletal nervous system leading to stiffness, weakness, pain and other manifestations of the hand, should go to the hospital in time for treatment.